Ultrahigh-speed thick material zigzag seam transmission mechanism

Abstract

The utility model discloses an ultra-high-speed thick material zigzag seam transmission mechanism which comprises an upper shaft and a lower shaft which rotate on a sewing machine shell in a fixed-axis mode, the upper shaft is driven by a power mechanism to rotate in the fixed-axis mode, and synchronous belt wheels are coaxially and fixedly connected to the corresponding positions of one end of the upper shaft and one end of the lower shaft. The outer contours of the two synchronous belt pulleys are in transmission connection with a synchronous belt enabling the upper shaft and the lower shaft to rotate synchronously, and a rotating shuttle shaft which is horizontally arranged and is perpendicular to the lower shaft is rotationally connected to the sewing machine shell at the end, away from the synchronous belt pulleys, of the lower shaft through a fixed shaft. The end, close to the lower shaft, of the rotating shuttle shaft is coaxially and fixedly connected with a rotating shuttle assembly carrying bottom threads to complete stitches, the outer contour of the end, close to the rotating shuttle assembly, of the lower shaft is coaxially and fixedly connected with a rotating shuttle driving gear, and a rotating shaft set parallel to the lower shaft is rotationally connected to the portion, close to one side of the rotating shuttle driving gear, of the sewing machine shell through a fixed shaft. The sewing machine has the advantages that the occupied space below the bottom plate is reduced, and the working efficiency of the sewing machine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewing machines, in particular to an ultra-high-speed thick-material zigzag sewing transmission mechanism. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing materials are interwoven or sewn together. A sewing machine can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, and products such as leather, plastic, and paper. The stitches are neat, beautiful, flat, and firm, with fast sewing speed and easy use. A zigzag sewing machine is a special sewing machine, also known as a zigzag sewing machine or a herringbone sewing machine, which is used for zigzag sewing with certain elastic stitches. The mainstream zigzag sewing machines for thick materials on the market currently have gear transmission for the upper and lower shafts, and the speed is generally around 2000r / min. With the development of society and the increase in labor costs, it is particularly important to improve work efficiency. The sewing speed of 2000r / min can no longer meet the needs of factories such as shoemaking, sofas, bags, and clothing.

[0003] The existing Chinese patent with patent number CN112411034A discloses a new connecting rod feeding reverse stitching structure of a zigzag sewing machine, including a driving mechanism, a feeding mechanism, a tooth lifting mechanism and a reverse stitching mechanism. An eccentric transmission wheel is provided on the outer peripheral side of the front end of the main transmission shaft, and a tooth lifting connecting rod and a feeding connecting rod are arranged on the outer peripheral side of the eccentric transmission wheel. The feeding connecting rod is hinged with a feeding adjustment seat group, and a feeding connecting rod crank and a reverse stitching connecting rod are provided on the feeding adjustment seat group. The reverse stitching connecting rod is provided with a reverse stitching crank and a stitch length adjustment shaft; the tooth lifting connecting rod is hinged with a tooth lifting connecting rod crank.

[0004] The existing devices have complex structures because their shuttle shaft gear and transmission shaft gear are arranged up and down or driven by synchronous belts, which makes the machine bulky, difficult to maintain, and the base plate occupies a large space; some other devices have bottlenecks in speeding up during sewing, or it is difficult to use large-capacity shuttles, affecting the working efficiency of the sewing machine.

[0005] Therefore, we proposed an ultra-high-speed thick material zigzag seam transmission mechanism. Summary of the invention

[0006] The purpose of the present invention is to provide an ultra-high-speed thick material zigzag seam transmission mechanism, which has the advantages of reducing the space occupied under the bottom plate, improving the working efficiency of the sewing machine, facilitating later maintenance, and solving the problems in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultra-high-speed thick-material zigzag seam transmission mechanism, comprising an upper shaft and a lower shaft that rotate on a fixed axis on a sewing machine housing, and the upper shaft is driven by a power mechanism to rotate on a fixed axis, and synchronous pulleys are coaxially fixedly connected to corresponding positions at one end of the upper shaft and the lower shaft, and a synchronous belt that enables the upper shaft and the lower shaft to rotate synchronously is connected to the outer contour of the two synchronous pulleys, and a horizontally arranged and perpendicularly placed rotary hook shaft is rotatably connected to the sewing machine housing at one end of the lower shaft away from the synchronous pulley, and a rotary hook shaft that carries the bottom line to complete the stitch is coaxially fixedly connected to the end of the rotary hook shaft close to the lower shaft A shuttle assembly, a shuttle driving gear is coaxially fixedly connected to the outer contour of the lower shaft near one end of the shuttle assembly, a rotating shaft placed parallel to the lower shaft is fixedly rotatably connected on the sewing machine housing near the side of the shuttle driving gear, a shuttle driven gear meshing with the shuttle driving gear is coaxially fixedly connected to the rotating shaft, a shuttle drive gear is meshingly driven on the side of the shuttle driven gear away from the shuttle driving gear, and the shuttle drive gear is penetrated and fixedly connected with a shuttle drive shaft fixedly rotated with the sewing machine housing, and the shuttle gears for meshing transmission are fixedly connected to the outer contours of the shuttle drive shaft and the shuttle shaft at corresponding positions.

[0008] Preferably, the upper shaft is provided with a sewing mechanism for sewing cloth, the sewing mechanism includes a sleeve coaxially fixedly connected to the outer contour of the end of the upper shaft away from the synchronous pulley, a needle bar body is penetrated and movably connected to the sewing machine housing near the end of the sleeve, a needle bar crank for driving the needle bar body to lift and reciprocate is coaxially fixedly connected to the end of the sleeve away from the synchronous pulley, a crank shaft is penetrated and fixedly connected to the needle bar crank at a position off-center, a needle bar connecting rod for transmitting power to the needle bar body is rotatably connected to the outer contour of the end of the crank shaft away from the needle bar crank, and the bottom end of the needle bar connecting rod is penetrated and rotatably connected to a needle bar joint for supporting the needle bar body.

[0009] Preferably, a thread take-up rod for supplying thread traces between the needle bar body and the rotary hook assembly is rotatably connected to the outer contour of the crank shaft near one end of the needle bar crank, and a thread take-up crank for supporting the thread take-up rod is rotatably connected to the thread take-up rod via a pin shaft, and a fixing pin is penetrated and rotatably connected to the side of the thread take-up crank away from the thread take-up rod, and the fixing pin is fixedly connected to the sewing machine housing.

[0010] Preferably, a cloth feed shaft placed parallel to the lower shaft is rotatably connected to a fixed axis on a sewing machine housing near one end of the rotary hook assembly, and a cloth feed crank is coaxially fixedly connected to the outer contour of the cloth feed shaft away from the rotary hook assembly.

[0011] Preferably, a cloth feed cam is coaxially fixedly connected to the outer contour of the lower shaft corresponding to the reverse stitching station, and a cam connecting rod is rotatably connected to the outer contour of the cloth feed cam. The bottom end of the cam connecting rod is rotatably connected to a cloth feed connecting rod which pulls the cloth feed shaft to perform fixed-axis reciprocating rotation through a pin shaft, and the end of the cloth feed connecting rod close to the cloth feed shaft is rotatably connected to the bottom end of the cloth feed crank through a pin shaft.

[0012] Preferably, a cloth feeding mechanism for transferring cloth is provided on the lower shaft, and the cloth feeding mechanism includes an end of the lower shaft away from the synchronous pulley, which is rotatably connected to a cloth feeding exchange crank for adjusting the cloth feeding direction via a pin shaft, and an end of the cloth feeding exchange crank away from the lower shaft is rotatably connected to a tooth rack body for cooperating in cloth feeding via a pin shaft, and a feed tooth for controlling cloth feeding is fixedly connected to the tooth rack body.

[0013] Preferably, a tooth frame crank that pushes the tooth frame body to move horizontally back and forth is coaxially fixedly connected to the outer contour of the corresponding position of the cloth feed shaft near one end of the tooth frame body, and the top end of the tooth frame crank and the end of the tooth frame body away from the cloth feed tooth are penetrated and coaxially rotatably connected with a tooth frame connecting shaft.

[0014] Preferably, a reverse stitching station for adjusting the cloth feeding direction and distance is movably connected to the sewing machine housing at a position corresponding to the cloth feeding cam on the side of the lower shaft away from the cloth feeding shaft, and the end of the cloth feeding connecting rod away from the cloth feeding crank is rotatably connected to the reverse stitching station via a pin.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up multi-gear meshing and matching, the lower shaft, rotating shaft, and rotary hook transmission shaft are placed in parallel to achieve a more efficient transmission mechanism. At the same time, the space occupied under the bottom plate is greatly reduced, reducing space occupancy and machine vibration, providing users with a more comfortable working environment. The rotary hook assembly is placed in a position directly facing the operator for easy maintenance. At the same time, the rotary hook shaft rotates counterclockwise to adapt to the larger rotary hook assembly commonly used for thick materials on the market, so as to obtain longer continuous working time and improve the working efficiency of the sewing machine.

[0017] 2. As the synchronous pulley on the upper shaft drives the lower shaft to rotate synchronously, the shuttle driving gear on the lower shaft drives the shuttle driven gear on the rotating shaft to rotate, and at the same time, the shuttle driven gear drives the shuttle gear on the shuttle transmission shaft to rotate synchronously, so that the shuttle shaft drives the shuttle assembly to rotate counterclockwise under the action of the shuttle gear, thereby realizing the correct operation of the shuttle assembly, and the needle bar crank on the upper shaft drives the needle bar body and the thread take-up rod to move synchronously, so that when the needle bar body and the thread take-up rod move one cycle, the shuttle moves two cycles, further ensuring the synchronization of the upper and lower parts during high-speed sewing and neat thread collection.

[0018] 3. With the reciprocating swing of the cloth feed shaft, the rack crank can push the rack body to move horizontally back and forth. Through the cloth feed teeth set on the rack body, the cloth feed teeth feed the cloth into the sewing area at a uniform speed under the action of the rack body. By setting the rack body and the rack crank to be made of aluminum material, the length is shortened and the weight is reduced while ensuring its strength. While providing a larger bobbin picking space, the maximum speed of the machine for special fabric stitches is guaranteed to be 4500r / min.

[0019] The coordinated use of the above-mentioned structure solves the problem that the existing type of device has a complex structure due to the vertical arrangement of the shuttle shaft gear and the transmission shaft gear or synchronous belt transmission, which leads to a bulky machine, difficulty in maintenance, and a large space occupied by the base plate; and other devices have bottlenecks in speeding up during sewing or it is difficult to use a large-capacity shuttle, which affects the working efficiency of the sewing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the explosion of the three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the part where the rotary hook assembly of the present invention is located;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the cloth feeding cam of the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the thread take-up lever of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the cloth feeding connecting rod of the present invention;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the part where the driven gear of the rotary hook of the present invention is located;

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the part where the tooth frame of the present invention is located.

[0029] In the figure: 1. cloth feed cam; 2. cloth feed connecting rod; 3. cam connecting rod; 4. cloth feed crank; 5. cloth feed exchange crank; 7. hook assembly; 8. synchronous pulley; 9. needle bar connecting rod; 10. bushing; 11. needle bar joint; 12. needle bar body; 13. synchronous belt; 14. hook transmission shaft; 15. cloth feed dog; 16. thread take-up rod; 17. fixing pin; 18. crank shaft; 19. needle bar crank; 20. thread take-up crank; 21. hook driving gear; 22. hook driven gear; 23. hook transmission gear; 24. hook gear; 25. hook shaft; 26. rotating shaft; 27. tooth frame body; 28. tooth frame connecting shaft; 29. ​​cloth feed shaft; 30. tooth frame crank; 31. upper shaft; 32. lower shaft; 33. reverse stitching table. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 8The present invention provides a technical solution: an ultra-high-speed thick material zigzag seam transmission mechanism, comprising an upper shaft 31 and a lower shaft 32 which rotate on a fixed axis on a sewing machine housing, and the upper shaft 31 is driven by a power mechanism to rotate on a fixed axis, and a synchronous pulley 8 is coaxially fixedly connected to the corresponding positions of one end of the upper shaft 31 and the lower shaft 32, and a synchronous belt 13 which makes the upper shaft 31 and the lower shaft 32 rotate synchronously is connected to the outer contour of the two synchronous pulleys 8, and a horizontally arranged and perpendicularly placed rotary hook shaft 25 is rotatably connected to the sewing machine housing at one end of the lower shaft 32 away from the synchronous pulley 8, and a rotary hook assembly 7 carrying a bottom line to complete the stitch is coaxially fixedly connected to the rotary hook shaft 25 near the lower shaft 32, and the rotary hook assembly 7 carrying a bottom line to complete the stitch is coaxially fixedly connected to the upper shaft 31 and the lower shaft 32. A rotary shuttle driving gear 21 is coaxially fixedly connected to the outer contour of the lower shaft 32 at one end close to the rotary shuttle assembly 7, and a rotating shaft 26 placed parallel to the lower shaft 32 is fixedly rotatably connected on the sewing machine housing close to the rotary shuttle driving gear 21, and a rotary shuttle driven gear 22 meshing with the rotary shuttle driving gear 21 is coaxially fixedly connected to the rotating shaft 26, and a rotary shuttle transmission gear 23 is meshingly transmitted on the side of the rotary shuttle driven gear 22 away from the rotary shuttle driving gear 21, and the rotary shuttle transmission gear 23 is penetrated and fixedly connected with a rotary shuttle transmission shaft 14 that rotates with the sewing machine housing on a fixed axis, and the rotary shuttle gear 24 that meshes with the transmission is fixedly connected to the outer contours of the rotary shuttle transmission shaft 14 and the rotary shuttle shaft 25 at corresponding positions.

[0033] When in use, the above-mentioned sewing machine housing is an existing device well known to those skilled in the art, so no further details will be given here. Through the upper shaft 31 and the lower shaft 32 arranged on the sewing machine housing, the upper shaft 31 and the lower shaft 32 are connected to rotate on the sewing machine housing on a fixed axis. Through the synchronous pulleys 8 arranged on the upper shaft 31 and the lower shaft 32, and the synchronous belts 13 arranged on the two synchronous pulleys 8, the synchronous belts 13 are connected to the outer contours of the two synchronous pulleys 8 for transmission. The upper shaft 31 is driven by the power mechanism to rotate on a fixed axis, and the power mechanism is an energized motor, so that the motor drives the upper shaft 31 to rotate on the sewing machine housing on a fixed axis. At the same time, the synchronous pulleys 8 and the synchronous belts 13 can drive the lower shaft 32 to rotate on a fixed axis synchronously under the action of the upper shaft 31, through the rotary hook driving gear 21 arranged on the lower shaft 32, and the rotary hook driving gear 21 is meshed with the rotary hook driven gear 22 for transmission. , along with the fixed-axis rotation of the lower shaft 32, the shuttle driven gear 22 can drive the rotating shaft 26 to rotate on the sewing machine housing under the action of the shuttle driving gear 21, and the shuttle driven gear 22 is meshed with the shuttle transmission gear 23 for transmission, and the shuttle transmission shaft 14 supports the shuttle transmission gear 23 on the sewing machine housing, so that the shuttle transmission gear 23 drives the shuttle transmission shaft 14 to rotate on the sewing machine housing synchronously under the action of the shuttle driven gear 22, and through the set shuttle shaft 25, the shuttle shaft 25 supports the shuttle assembly 7 on the sewing machine housing, and the shuttle shaft 25 and the shuttle gear 24 set on the shuttle transmission shaft 14, along with the fixed-axis rotation of the shuttle transmission shaft 14, and then the shuttle shaft 25 drives the shuttle assembly 7 to rotate on the fixed axis under the action of the shuttle gear 24, so that the subsequent shuttle assembly 7 carries the bottom line to form a stitch.

[0034] By setting up multiple sets of gear meshing and matching, the lower shaft 32, the rotating shaft 26, and the shuttle transmission shaft 14 are placed in parallel to achieve a more efficient transmission mechanism. At the same time, the space occupied under the bottom plate is greatly reduced, the space occupancy and machine vibration are reduced, and a more comfortable working environment is provided for the user. The shuttle assembly 7 is placed in a position directly facing the operator for easy maintenance. At the same time, the shuttle shaft 25 is rotated counterclockwise to adapt to the larger shuttle assembly 7 commonly used for thick materials on the market, so as to obtain a longer continuous working time and improve the working efficiency of the sewing machine.

[0035] Embodiment 2:

[0036] See also Figure 1 , Figure 2 and Figure 6 On the basis of the first embodiment, further:

[0037] The upper shaft 31 is provided with a sewing mechanism for sewing cloth, and the sewing mechanism includes a sleeve 10 coaxially fixedly connected to the outer contour of the end of the upper shaft 31 away from the synchronous pulley 8, and a needle bar body 12 is penetrated and movably connected to the sewing machine housing near the end of the sleeve 10, and a needle bar crank 19 for driving the needle bar body 12 to move up and down and reciprocate is coaxially fixedly connected to the end of the sleeve 10 away from the synchronous pulley 8, and a crank shaft 18 is penetrated and fixedly connected to the needle bar crank 19 at an offset position from the center, and a needle bar connecting rod 9 for transmitting power to the needle bar body 12 is rotatably connected to the outer contour of the crank shaft 18 away from the needle bar crank 19, and a needle bar joint 11 for supporting the needle bar body 12 is penetrated and rotatably connected to the bottom end of the needle bar connecting rod 9.

[0038] A thread take-up lever 16 for supplying stitches between the needle bar body 12 and the rotary hook assembly 7 is rotatably connected to the outer contour of the crank shaft 18 near one end of the needle bar crank 19. A thread take-up crank 20 for supporting the thread take-up lever 16 is rotatably connected to the thread take-up lever 16 via a pin shaft. A fixing pin 17 is penetrated and rotatably connected to the side of the thread take-up crank 20 away from the thread take-up lever 16, and the fixing pin 17 is fixedly connected to the sewing machine housing.

[0039] When in use, through the needle bar body 12, the sewing machine housing supports and limits the vertical movement of the needle bar body 12, and through the shaft sleeve 10 set on the upper shaft 31, and the needle bar crank 19 set on the shaft sleeve 10, the shaft sleeve 10 can drive the needle bar crank 19 to rotate synchronously with the upper shaft 31, and the crank shaft 18 set on the needle bar crank 19, and the needle bar connecting rod 9 set on the crank shaft 18, the needle bar connecting rod 9 is rotatably connected on the outer contour of the crank shaft 18, and the needle bar joint 11 set on the needle bar connecting rod 9, first fix the needle bar body 12 on the inner wall of the needle bar joint 11, and rotate along with the needle bar crank 19, so that the needle bar connecting rod 9 is rotated on the needle bar crank Under the action of 19, the needle bar body 12 is pulled to maintain a vertical state for lifting and reciprocating movement. Through the thread take-up lever 16 arranged on the crank shaft 18 and the thread take-up crank 20 arranged on the thread take-up lever 16, the thread take-up lever 16 is rotatably connected with the crank shaft 18 and the thread take-up crank 20. Through the fixing pin 17 arranged on the thread take-up crank 20, the fixing pin 17 can support and limit one end of the thread take-up crank 20 away from the thread take-up lever 16 on the sewing machine casing. Along with the fixed-axis rotation of the needle bar crank 19, the thread take-up lever 16 is supported by the thread take-up crank 20 to swing back and forth along a fan-shaped trajectory, and then the thread take-up lever 16 can supply thread traces between the needle bar body 12 and the rotary shuttle assembly 7 to form a sewing line.

[0040] The needle bar body 12 is fixedly connected to the needle bar joint 11, and the needle bar joint 11 is detachably connected to the needle bar connecting rod 9, so that the needle bar body 12 can adjust the needle distance of the needle bar body 12 according to different sewing requirements, so that the needle bar body 12 can sew different stitch styles by selecting different modes.

[0041] As the synchronous pulley 8 on the upper shaft 31 drives the lower shaft 32 to rotate synchronously through the synchronous belt 13, the shuttle driving gear 21 on the lower shaft 32 drives the shuttle driven gear 22 on the rotating shaft 26 to rotate, and at the same time, the shuttle driven gear 22 drives the shuttle gear 24 on the shuttle transmission shaft 14 to rotate synchronously, so that the shuttle shaft 25 drives the shuttle assembly 7 to move counterclockwise under the action of the shuttle gear 24, thereby realizing the correct operation of the shuttle assembly 7, and the needle bar crank 19 on the upper shaft 31 drives the needle bar body 12 and the thread take-up rod 16 to move synchronously, so that when the needle bar body 12 and the thread take-up rod 16 move one cycle, the shuttle moves two cycles, further ensuring the synchronization of the upper and lower parts during high-speed sewing and the neat thread collection.

[0042] Embodiment three:

[0043] See also Figure 1 , Figure 2 , Figure 5 and Figure 7 On the basis of the second embodiment, further:

[0044] A cloth feed shaft 29 placed parallel to the lower shaft 32 is rotatably connected to the sewing machine housing near one end of the rotary hook assembly 7 , and a cloth feed crank 4 is coaxially fixedly connected to the outer contour of the cloth feed shaft 29 away from the rotary hook assembly 7 .

[0045] A cloth feed cam 1 is coaxially fixedly connected to the outer contour of the lower shaft 32 corresponding to the reverse stitching table 33, and a cam connecting rod 3 is rotatably connected to the outer contour of the cloth feed cam 1. The bottom end of the cam connecting rod 3 is rotatably connected to a cloth feed connecting rod 2 which pulls the cloth feed shaft 29 for fixed-axis reciprocating rotation through a pin, and the end of the cloth feed connecting rod 2 close to the cloth feed shaft 29 is rotatably connected to the bottom end of the cloth feed crank 4 through a pin.

[0046] When in use, by setting the cloth feed shaft 29, the cloth feed shaft 29 is connected to the sewing machine housing in a fixed axis rotation manner, and through the cloth feed cam 1 set on the lower shaft 32, and the cloth feed cam 1 set on the lower shaft 32, the lower shaft 32 can drive the cloth feed cam 1 to rotate synchronously, and through the cloth feed crank 4 set on the cloth feed shaft 29, and the cloth feed connecting rod 2 set on the cloth feed crank 4, the cloth feed crank 4 can support and limit the cloth feed connecting rod 2, and through the cam connecting rod 3 set on the cloth feed cam 1, and the cam connecting rod 3 is rotationally connected on the outer contour of the cloth feed cam 1, and the cloth feed connecting rod 2 is rotationally supported on the cam connecting rod 3, so that the cam connecting rod 3 reciprocates up and down under the rotation of the cloth feed cam 1, and the cloth feed connecting rod 2 can pull the cloth feed crank 4 and the cloth feed shaft 29 to reciprocate under the action of the cam connecting rod 3.

[0047] By setting the size ratio of the cam connecting rod 3, the feed crank 4, the feed connecting rod 2 and the reverse stitching platform 33, it is achieved that the maximum forward feed amount is 5mm and the deviation of the reverse feed amount is less than 10%.

[0048] Embodiment 4:

[0049] See also Figure 1 , Figure 3 , Figure 4 and Fig. 9 On the basis of the third embodiment, further:

[0050] The lower shaft 32 is provided with a cloth feeding mechanism for moving cloth, and the cloth feeding mechanism includes an end of the lower shaft 32 away from the synchronous pulley 8, which is rotatably connected to a cloth feeding exchange crank 5 for adjusting the cloth feeding tightness according to the cloth via a pin shaft; the end of the cloth feeding exchange crank 5 away from the lower shaft 32 is rotatably connected to a tooth frame body 27 for cooperating in cloth feeding via a pin shaft, and the tooth frame body 27 is fixedly connected with a cloth feeding tooth 15 for controlling the cloth feeding.

[0051] A tooth frame crank 30 is coaxially fixedly connected to the outer contour of the cloth feed shaft 29 at a corresponding position near one end of the tooth frame body 27 for pushing the tooth frame body 27 to move horizontally back and forth. The top end of the tooth frame crank 30 and the end of the tooth frame body 27 away from the cloth feed dog 15 are penetrated and coaxially rotatably connected with a tooth frame connecting shaft 28.

[0052] When in use, the cloth feed exchange crank 5 arranged on the lower shaft 32 is rotationally connected to the lower shaft 32, and the tooth frame body 27 arranged on the cloth feed exchange crank 5 enables the cloth feed exchange crank 5 to support and limit the tooth frame body 27, and the tooth frame crank 30 arranged on the cloth feed shaft 29, and the tooth frame crank 30 and the tooth frame connecting shaft 28, the tooth frame connecting shaft 28 can connect the tooth frame crank 30 with the tooth frame body 27 for fixed-axis rotation, accompanied by the reciprocating swing of the cloth feed shaft 29, so that the tooth frame crank 30 can push the tooth frame body 27 to reciprocate horizontally, and the cloth feed tooth 15 arranged on the tooth frame body 27 enables the cloth feed tooth 15 to feed the cloth into the sewing area at a uniform speed under the action of the tooth frame body 27.

[0053] By setting the tooth frame body 27 and the tooth frame crank 30 to be made of aluminum material, the length is shortened and the weight is reduced while ensuring their strength. While providing a larger bobbin taking space, the maximum speed of the machine for special fabric stitches is guaranteed to be 4500r / min.

[0054] Embodiment five:

[0055] See also Figure 1 , Figure 2 and Figure 5 On the basis of the fourth embodiment, further:

[0056] A reverse stitching platform 33 for adjusting the cloth feeding direction and distance is movably connected to the sewing machine housing at a position corresponding to the cloth feeding cam 1 on the side of the lower shaft 32 away from the cloth feeding shaft 29, and the end of the cloth feeding connecting rod 2 away from the cloth feeding crank 4 is rotatably connected to the reverse stitching platform 33 through a pin shaft.

[0057] When in use, the reverse sewing station 33 is set, and the reverse sewing station 33 is controlled to move through the cloth feeding connecting rod 2, so that the reverse sewing station 33 can control the reverse movement of the cloth, ensuring that the sewn seams can be firmly locked on the cloth at the end.

[0058] It is further realized that the existing device can reduce the space occupied under the bottom plate, reduce space occupation and machine vibration, improve the working efficiency of the sewing machine, and is easy to use, which is better than traditional products.

[0059] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-high-speed thick material zigzag sewing transmission mechanism, comprising a sewing machine housing, characterized in that: The invention comprises an upper shaft (31) and a lower shaft (32) which are rotatable on a fixed axis on a sewing machine housing, and the upper shaft (31) is driven by a power mechanism to rotate on a fixed axis, synchronous pulleys (8) are coaxially fixedly connected at corresponding positions on one end of the upper shaft (31) and the lower shaft (32), and a synchronous belt (13) which makes the upper shaft (31) and the lower shaft (32) rotate synchronously is connected to the outer contour of the two synchronous pulleys (8), a rotary hook shaft (25) which is horizontally arranged and placed perpendicular to the lower shaft (32) is rotatably connected on the sewing machine housing at one end of the lower shaft (32) away from the synchronous pulley (8), a rotary hook assembly (7) which carries a bottom line to complete a stitch is coaxially fixedly connected to the rotary hook shaft (25) at one end of the rotary hook shaft (25) close to the lower shaft (32), and the lower shaft (32) close to the rotary hook assembly (13) is connected to the upper shaft (31) and the lower shaft (32) is connected to the rotary hook assembly (13) at one end of the lower shaft (32) away from the synchronous pulley (8). 7) is coaxially fixedly connected to the outer contour of one end of the sewing machine, a rotating shaft (26) placed parallel to the lower shaft (32) is fixedly connected to the sewing machine housing near the rotating shuttle driving gear (21) in a fixed-axis rotation manner, a rotating shuttle driven gear (22) meshing with the rotating shuttle driving gear (21) is coaxially fixedly connected to the rotating shaft (26), a rotating shuttle drive gear (23) meshing with the rotating shuttle driving gear (21) is meshed on the side of the rotating shuttle driven gear (22) away from the rotating shuttle driving gear (21), and the rotating shuttle drive gear (23) is penetrated and fixedly connected to a rotating shuttle drive shaft (14) that is fixedly rotated with the sewing machine housing, and the rotating shuttle gear (24) that meshes with the rotating shuttle shaft (25) is fixedly connected to the outer contours at the corresponding positions of the rotating shuttle drive shaft (14) and the rotating shuttle shaft (25).

2. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 1, characterized in that: The upper shaft (31) is provided with a sewing mechanism for sewing fabrics, the sewing mechanism comprising a sleeve (10) coaxially fixedly connected to the outer contour of the end of the upper shaft (31) away from the synchronous pulley (8), a needle bar body (12) penetrated and movably connected to the sewing machine housing near the end of the sleeve (10), a needle bar crank (19) for driving the needle bar body (12) to move up and down and reciprocate is coaxially fixedly connected to the end of the sleeve (10) away from the synchronous pulley (8), a crank shaft (18) is penetrated and fixedly connected to the needle bar crank (19) at a position off-center, a needle bar connecting rod (9) for transmitting power to the needle bar body (12) is rotatably connected to the outer contour of the end of the crank shaft (18) away from the needle bar crank (19), and a needle bar joint (11) for supporting the needle bar body (12) is penetrated and rotatably connected to the bottom end of the needle bar connecting rod (9).

3. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 2, characterized in that: A thread take-up rod (16) for supplying stitches between the needle bar body (12) and the rotary hook assembly (7) is rotatably connected to the outer contour of the crank shaft (18) at one end thereof close to the needle bar crank (19); a thread take-up rod (16) for supporting the thread take-up rod (16) is rotatably connected to the thread take-up rod (16) via a pin shaft; a fixing pin (17) is penetrated and rotatably connected to the side of the thread take-up crank (20) away from the thread take-up rod (16); and the fixing pin (17) is fixedly connected to a sewing machine housing.

4. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 3, characterized in that: A cloth feed shaft (29) placed parallel to the lower shaft (32) is rotatably connected to a sewing machine housing near one end of the rotary hook assembly (7), and a cloth feed crank (4) is coaxially fixedly connected to the outer contour of the cloth feed shaft (29) away from the rotary hook assembly (7).

5. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 4, characterized in that: A cloth feed cam (1) is coaxially fixedly connected to the outer contour of the lower shaft (32) at a position corresponding to the reverse stitching platform (33); a cam connecting rod (3) is rotatably connected to the outer contour of the cloth feed cam (1); the bottom end of the cam connecting rod (3) is rotatably connected to a cloth feed connecting rod (2) that pulls the cloth feed shaft (29) to perform fixed-axis reciprocating rotation via a pin shaft; and one end of the cloth feed connecting rod (2) close to the cloth feed shaft (29) is rotatably connected to the bottom end of a cloth feed crank (4) via a pin shaft.

6. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 5, characterized in that: The lower shaft (32) is provided with a cloth feeding mechanism for transferring cloth, the cloth feeding mechanism comprising a cloth feeding exchange crank (5) for adjusting cloth feeding tightness according to cloth, which is rotatably connected to one end of the lower shaft (32) away from the synchronous belt pulley (8) through a pin shaft, and a tooth frame body (27) for cooperating with cloth feeding, which is rotatably connected to one end of the cloth feeding exchange crank (5) away from the lower shaft (32) through a pin shaft, and a cloth feeding tooth (15) for controlling cloth feeding is fixedly connected to the tooth frame body (27).

7. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 5, characterized in that: A tooth frame crank (30) is coaxially fixedly connected to the outer contour of the cloth feeding shaft (29) at a corresponding position close to one end of the tooth frame body (27) for pushing the tooth frame body (27) to move horizontally back and forth, and the top end of the tooth frame crank (30) and the end of the tooth frame body (27) away from the cloth feeding tooth (15) are penetrated and coaxially rotatably connected with a tooth frame connecting shaft (28).

8. The ultra-high-speed thick material zigzag seam transmission mechanism according to claim 6, characterized in that: A reverse stitching platform (33) for adjusting the cloth feeding direction and distance is movably connected to the sewing machine housing at a position corresponding to the cloth feeding cam (1) on the side of the lower shaft (32) away from the cloth feeding shaft (29), and an end of the cloth feeding connecting rod (2) away from the cloth feeding crank (4) is rotatably connected to the reverse stitching platform (33) via a pin shaft.

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