Small transverse cylinder detachable zigzag sewing machine and method

Abstract

The invention relates to the field of sewing machines, and discloses a zigzag sewing machine with a detachable small transverse cylinder and a method. The zigzag sewing machine comprises a base, a middle base is installed at the top end of the base, a machine shell is installed at the top end of the middle base, an upper shaft is installed at the right end of the machine shell and can be driven through a motor and a belt, and a needle rod assembly is installed on the inner wall of the machine shell; the left end, close to the needle rod assembly, of the inner wall of the machine shell is provided with an upper cloth feeding assembly, the left end of the middle base is provided with a thread hooking mechanism, the thread hooking mechanism comprises a transmission assembly and a transverse cylinder assembly, the transverse cylinder assembly comprises a transverse cylinder base, and the right end of the transverse cylinder base is fixedly connected to the left end of the middle base. According to the rotating shuttle assembly, the size of the whole rotating shuttle assembly can be reduced by changing the appearance of the transmission structure and the appearance of the rotating shuttle assembly, meanwhile, due to the fact that the size of the rotating shuttle assembly is reduced, the whole transverse barrel assembly can be supported through a transverse barrel base with the smaller size, and compared with a transverse barrel base in the prior art, the size of the transverse barrel base in the Y-axis direction can be shortened by 2 cm or above.

Description

Technical Field

[0001] The invention relates to the field of sewing machines, and in particular to a zigzag sewing machine with a detachable small horizontal cylinder and a method thereof. Background Art

[0002] Sewing machines are mainly used to sew multiple layers of fabrics together. With the development and iteration of technology, sewing machines have developed into various styles to adapt to the sewing operations of various different kinds of fabrics. Currently on the market there is a zigzag sewing machine that can produce zigzag stitches on the surface of shoes, bags or tubular objects by swinging the needle.

[0003] The original horizontal cylinder zigzag sewing machine has a large size in the Y-axis direction due to the long length of the rotary shuttle. The parts of the rotary shuttle transmission mechanism occupy a large size due to the long length of the rotary shuttle, which leads to a large diameter of the horizontal cylinder and a large circumference of the cylinder. The diameter and circumference of the sewing object need to be large in order to be inserted into the horizontal cylinder for sewing operations, and children's shoes with small shoe openings or smaller diameter cylindrical objects cannot be inserted into the small mouth of the herringbone horizontal cylinder zigzag sewing machine for rotation and sewing. Therefore, at present, one way to sew the hemming of such small-diameter children's shoes is to use a sewing machine with straight stitches. The stitches are not as beautiful as the herringbone stitches, and the firmness of the hemming is not as good as that of the zigzag sewing machine. The second way is to use the zigzag sewing of the horizontal cylinder. Because the cylinder diameter of the sewing machine is large, the shoe opening cannot be completely inserted into the cylinder for sewing. This requires high technical skills of the operator and the overall device is relatively inconvenient to use. Summary of the invention

[0004] In order to remedy the above deficiencies, the present invention provides a small horizontal cylinder detachable zigzag sewing machine and method, aiming to improve the problem in the prior art that "the existing sewing machine cylinder diameter is large, which is inconvenient when sewing the edge of small-caliber children's shoes."

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a small horizontal cylinder detachable zigzag sewing machine and method, comprising a base, a middle seat is installed at the top of the base, a casing is installed at the top of the middle seat, an upper shaft is installed at the right end of the casing, and the upper shaft can be driven by a motor and a belt, a needle bar assembly is installed on the inner wall of the casing, an upper cloth feeding assembly is installed on the inner wall of the casing near the left end of the needle bar assembly, a thread hooking mechanism is installed on the left end of the middle seat, the thread hooking mechanism includes a transmission assembly and a horizontal cylinder assembly, the horizontal cylinder assembly includes a horizontal cylinder seat, the right end of the horizontal cylinder seat is fixedly connected to the left end of the middle seat, a passive gear is installed on the inner wall of the horizontal cylinder seat near the left end, and a driving gear is installed on the inner wall of the horizontal cylinder seat near the right end, the passive gear and the driving gear are meshed with each other, and a rotary shuttle assembly is installed at the front end of the passive gear.

[0006] As a further description of the above technical solution:

[0007] The needle bar assembly includes an output gear 1, which is fixedly connected to the outer wall of the upper shaft. The thread hooking mechanism also includes a transmission shaft 1, which is rotatably connected to the inner wall of the casing. The top of the transmission shaft 1 is meshed with the output gear 1, and the inner wall of the middle seat is rotatably connected to the bottom end of the transmission shaft 1 with a transmission shaft 2. The right end of the transmission shaft 2 is equipped with a transmission gear 1, and the left end of the transmission shaft 2 is equipped with a gear. The gear at the right end of the transmission shaft 2 is meshed with the transmission shaft 1.

[0008] As a further description of the above technical solution:

[0009] The transmission assembly includes a gear seat, which is fixedly connected to the inner wall of the middle seat, the front end of the gear seat passes through and is rotatably connected to a second rotating shaft, the front end of the second rotating shaft is meshed with the gear, the rear end of the second rotating shaft is installed with a synchronous pulley, and the synchronous pulley is connected to a second synchronous pulley through a synchronous belt drive, the inner wall of the cross cylinder seat passes through and is rotatably connected to a connecting shaft, the second synchronous pulley is installed on the outer wall of the connecting shaft near the rear end, and the connecting shaft passes through and is fixedly connected to the inner wall of the driving gear.

[0010] As a further description of the above technical solution:

[0011] A cover is installed at the rear end of the synchronous pulley 2, a synchronous baffle is installed at the connection between the cover and the synchronous pulley 2, a bracket plate is installed at the front end of the transverse cylinder seat near the front end of the driving gear, and a rotary shuttle positioning hook is installed at the front end of the bracket plate near the left end.

[0012] As a further description of the above technical solution:

[0013] The needle bar assembly also includes a swing needle driving gear, the inner wall of the casing is rotatably connected to the swing needle transmission shaft, the outer wall of the swing needle transmission shaft is fixedly connected to a cam 1, the outer wall of the swing needle transmission shaft is fixedly connected to a swing needle driven gear near the rear end of the cam 1, the swing needle driven gear and the swing needle driving gear are meshed with each other, the bottom end of the casing is slidably connected to the swing needle frame, the bottom end of the swing needle frame is fixedly connected to the needle bar, the front end of the swing needle frame is fixedly connected to a rocker arm 1, the rocker arm 1 and the cam 1 are connected in a high pair, a slider seat is installed at the front end of the rocker arm 1, the left end of the upper shaft is rotatably connected to the needle bar connecting rod, the left end of the needle bar connecting rod is fixedly connected to the needle bar joint, and the front end of the needle bar joint is fixedly connected to the rear end of the swing needle frame.

[0014] As a further description of the above technical solution:

[0015] The upper cloth feeding assembly includes a pressure rod 1, which is slidably connected to the inner wall of the casing, and a clamping rod 2 is slidably connected to the inner wall of the casing near the left end of the pressure rod 1. The bottom end of the pressure rod 1 is fixedly connected to an inner presser foot, and the outer wall of the pressure rod 2 is fixedly connected to a swing presser foot, and the outer wall of the pressure rod 2 is fixedly connected to a return spring 2, and the top of the return spring 2 is fixedly connected to the inner wall of the casing, and the outer wall of the pressure rod 1 is fixedly connected to a return spring 1, and the top of the return spring 1 is fixedly connected to the inner wall of the casing.

[0016] As a further description of the above technical solution:

[0017] The upper cloth feeding assembly also includes a crank 1, which is fixedly connected to the outer wall of the upper shaft, and the left end of the crank 1 is rotatably connected to the crank 2, and the left end of the crank 2 is rotatably connected to the triangular swing frame, and the right end of the triangular swing frame is rotatably connected to the left end of the inner presser foot, and the top of the swing presser foot is rotatably connected to the front end of the triangular swing frame, and the right end of the triangular swing frame is rotatably connected to the left end of the casing near the rear end position. The outer wall of the upper shaft is fixedly connected to a cam 2, and the inner wall of the middle seat is rotatably connected to a feeding shaft, and the outer wall of the feeding shaft is fixedly connected to a transmission crank, and the outer wall of the transmission crank is hinged with a transmission fork, and the outer wall of the transmission crank is hinged with a transmission connecting rod near the left end of the transmission fork, and the top end of the transmission connecting rod is hinged with a swing shaft, and the transmission fork is connected to the cam 2 in a high pair. The left end of the swing shaft is fixedly connected to a crank 3, and the right end of the crank 3 is rotatably connected to a crank 4, and the right end of the crank 4 is fixedly connected to the left end of the swing presser foot.

[0018] As a further description of the above technical solution:

[0019] A needle distance adjusting knob is installed at the front end of the casing near the right end of the transmission tooth fork.

[0020] As a further description of the above technical solution:

[0021] A bolt hole is provided at the rear end of the rotary shuttle assembly, and a fixing hole is provided at the front end of the passive gear, the fixing hole and the bolt hole are adapted to each other, an auxiliary wheel groove is provided at the top end of the transverse cylinder seat, and a needle hole groove is provided at the top end of the transverse cylinder seat near the front end of the auxiliary wheel groove, the inner wall of the rotary shuttle assembly is fixedly connected to an inner kettle, the outer wall of the rotary shuttle assembly is fixedly connected to an outer kettle, and the inner wall of the auxiliary wheel groove is rotatably connected to an auxiliary cloth feeding wheel.

[0022] As a further description of the above technical solution:

[0023] A method for using a small horizontal cylinder detachable zigzag sewing machine comprises the following steps:

[0024] S1: a preparation step, wherein the opening of the children's shoes to be sewn is sleeved on the outer wall of the horizontal cylinder seat, and the sewing position of the opening is aligned with the bottom end of the needle bar.

[0025] S2: Puncture step, start the motor to drive the upper shaft to rotate, and when the upper shaft rotates, it will drive the needle bar to swing back and forth through the swing needle driving gear. The rotation of the swing needle driven gear will drive the swing needle transmission shaft to rotate, and the rotation of the swing needle transmission shaft will drive the rocker arm to move up and down through the cam. The right end of the rocker arm cooperates with the slider seat. Changing the inclination angle of the slider seat can change the left and right position movement of the rocker arm, thereby driving the swing needle frame to reciprocate left and right. The swing needle frame swings left and right to make the needle bar swing left and right, so that the machine needle can swing back and forth perpendicular to the feeding direction to produce a zigzag stitch.

[0026] S3: Feeding step, when the upper shaft rotates, it will drive crank 1 to swing, and the swing of crank 1 will drive crank 2 to swing. At the same time, crank 1 and crank 2 will swing relative to each other. The swing of crank 2 will drive the triangular swing frame to swing, and the triangular swing frame will drive the swing presser foot and the inner presser foot to move up and down alternately. At the same time, when the upper shaft rotates, it will drive cam 2 to rotate, and the rotation of cam 2 will drive the transmission tooth fork to swing. Adjusting the stitch adjustment knob can change the swing amount of the transmission tooth fork. The swing of the transmission tooth fork will swing the transmission crank installed on the feeding shaft, thereby driving the transmission connecting rod to swing synchronously. When the transmission connecting rod swings, it will drive the swing shaft to swing. The swing of the swing shaft will drive crank 3 to swing. The swing of crank 3 can drive the swing presser foot to swing. At the same time, with the up and down alternating movement of the inner presser foot, the swing presser foot can reciprocate in an elliptical arc. In this way, during the sewing process, the arc swing of the swing presser foot can drive the movement of the sewing object.

[0027] S4: Sewing steps, when the upper shaft rotates, it will drive the transmission shaft 1 to rotate through the output gear 1, the rotation of the transmission shaft 1 will drive the transmission shaft 2 to rotate through the meshing of the gear and the transmission gear 1, when the transmission shaft 2 rotates, it will drive the rotating shaft 2 to rotate through the gear at the left end, the rotation of the rotating shaft 2 can drive the synchronous pulley 1 to rotate, the rotation of the synchronous pulley 1 will drive the synchronous pulley 2 to rotate synchronously with it through the synchronous belt, the rotation of the synchronous pulley 2 will drive the driving gear to rotate synchronously through the connecting shaft, the rotation of the driving gear will drive the driven gear to rotate, the rotation of the driven gear can drive the rotary hook assembly to rotate, the rotation of the rotary hook assembly cooperates with the up and down movement of the needle bar to achieve sewing operation.

[0028] The present invention has the following beneficial effects:

[0029] 1. In the present invention, the volume of the entire rotary hook assembly can be reduced by changing the transmission structure and the appearance of the rotary hook assembly. At the same time, due to the reduced volume of the rotary hook assembly, a smaller transverse cylinder seat can be used to support the entire transverse cylinder assembly. Compared with the transverse cylinder seat in the prior art, the Y-axial dimension can be shortened by more than 2CM, and the circumference of the transverse cylinder seat can be reduced by more than 3CM. In this way, when sewing the edges of small-caliber children's shoes, the shoe mouth can be directly sleeved on the outer wall of the transverse cylinder seat, and the overall device is more convenient to use.

[0030] 2. In the present invention, by adopting a modular design, the connecting shaft and the driving gear can be separated by removing the bolts during use, and then the bolts connecting the cross cylinder seat and the middle seat can be removed, and then the cross cylinder assembly can be removed as a whole, and then the entire cross cylinder assembly can be replaced, so that one machine can be used for multiple purposes, and the overall device has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall device of the present invention;

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the sewing assembly of the present invention;

[0033] Figure 3 It is a three-dimensional structural schematic diagram of the cloth feeding assembly in the present invention;

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure disassembly of the transmission assembly and the horizontal cylinder assembly in the present invention;

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the horizontal cylinder seat in the present invention;

[0036] Figure 6 It is a cross-sectional schematic diagram of the transverse tube in the present invention.

[0037] Legend:

[0038] 1. Base; 2. Casing; 3. Needle bar assembly; 301. Needle bar; 302. Output gear 1; 303. Swing needle driving gear; 304. Swing needle driven gear; 305. Swing needle transmission shaft; 306. Cam 1; 307. Rocker arm 1; 308. Swing needle frame; 309. Needle bar connecting rod; 310. Needle bar joint; 311. Slider seat; 4. Thread hooking mechanism; 401. Transmission shaft 1; 402. Transmission shaft 2; 403. Transmission gear 1; 404. Gear; 410. Transmission assembly; 411. Rotating shaft 2; 412. Gear seat; 413. Synchronous pulley 1; 414. Synchronous belt; 415. Synchronous pulley 2; 416. Synchronous baffle; 417. Cover; 418. Connecting shaft; 420. Cross cylinder assembly; 421. Cross cylinder seat; 4211. Auxiliary wheel groove; 4212. Needle hole slot; 422, passive gear; 4221, fixing hole; 423, driving gear; 424, rotary hook assembly; 4241, inner kettle; 4242, outer kettle; 4243, bolt hole; 425, bracket plate; 426, rotary hook positioning hook; 5, middle seat; 6, upper cloth feeding assembly; 601, crank 1; 602, pressure rod 1; 603, return spring 1; 604, crank 2; 605, Inner presser foot; 606, clamping rod 2; 607, reset spring 2; 608, swing presser foot; 609, swing shaft; 610, crank 3; 611, crank 4; 612, auxiliary cloth feeding wheel; 613, transmission fork; 614, transmission connecting rod; 615, feeding shaft; 616, stitch adjustment knob; 617, cam 2; 618, transmission crank; 619, triangular swing frame; 7, upper shaft. DETAILED DESCRIPTION

[0039] 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.

[0040] Reference Figure 1 , Figure 2 and Figure 5, an embodiment of the present invention is: a small horizontal cylinder detachable zigzag sewing machine and method, including a base 1 for supporting the overall device, a middle seat 5 for supporting the sewing object is installed on the top of the base 1, a casing 2 for wrapping the internal structure of the device is installed on the top of the middle seat 5, and an upper shaft 7 for driving the overall device to move is installed on the right end of the casing 2. The upper shaft 7 can be driven by a motor and a belt. Since the motor and pulley transmission are existing technologies and can be implemented by personnel in this field, due to the existing technology, this case will not be described in detail. A needle bar assembly 3 for piercing the sewing object is installed on the inner wall of the casing 2, and an upper cloth feeding assembly 6 for pushing the sewing object to move is installed on the inner wall of the casing 2 near the left end of the needle bar assembly 3, and a cloth feeding assembly 6 for cooperating with the needle bar 301 to move is installed on the left end of the middle seat 5. The thread hooking mechanism 4 for sewing includes a transmission assembly 410 for connecting the upper shaft 7 and the cross-cylinder assembly 420, and a cross-cylinder assembly 420 for assisting the needle bar 301 in pulling the thread. The cross-cylinder assembly 420 includes a cross-cylinder seat 421 for supporting the sewing object. The right end of the cross-cylinder seat 421 is fixedly connected to the left end of the middle seat 5. When sewing, the sewing object can be directly placed on the top of the cross-cylinder seat 421. A passive gear 422 for transmitting motion is installed on the inner wall of the cross-cylinder seat 421 near the left end. A driving gear 423 for driving the rotary shuttle assembly 424 to rotate is installed on the inner wall of the cross-cylinder seat 421 near the right end. The passive gear 422 and the driving gear 423 are meshed with each other. When the passive gear 422 rotates, it will drive the driving gear 423 to rotate in the opposite direction.

[0041] Reference Figure 1 , Figure 2 and Figure 6 The front end of the passive gear 422 is provided with a rotary hook assembly 424 for pulling the thread end, and the rear end of the rotary hook assembly 424 is provided with a bolt hole 4243 for accommodating a bolt, and the front end of the passive gear 422 is provided with a fixing hole 4221 for fixing the bolt, and the fixing hole 4221 and the bolt hole 4243 are adapted to each other. The rotary hook assembly 424 can be fixed to the front end of the passive gear 422 by using a bolt to penetrate the bolt hole 4243 and the fixing hole 4221 from front to back, and the top of the horizontal cylinder seat 421 is provided with an auxiliary wheel groove 4211 for accommodating the auxiliary cloth feeding wheel 612, and the horizontal cylinder seat 4 The top of the rotary shuttle assembly 421 is provided with a needle hole groove 4212 for the needle to pass through near the front end of the auxiliary wheel groove 4211, the inner wall of the rotary shuttle assembly 424 is fixedly connected with an inner pot 4241 for hooking and pulling the sewing thread, the outer wall of the rotary shuttle assembly 424 is fixedly connected with an outer pot 4242 for guiding the movement of the sewing thread, the outer pot 4242 of the rotary shuttle assembly 424 is fixed on the driven gear 422 so that it rotates synchronously with the driven gear 422 to hook the sewing thread, and the sewing thread bypasses the inner pot 4241 under the rotation of the outer pot 4242 to bring out the bottom line of the rotary shuttle assembly 424, thereby forming a sewing line trace.

[0042] Reference Figure 1 and Figure 2 The needle bar assembly 3 includes an output gear 302 for driving the overall thread hooking mechanism 4 to operate. The needle bar assembly 3 and the thread hooking mechanism 4 are driven by the rotation of the upper shaft 7. The output gear 302 is fixedly connected to the outer wall of the upper shaft 7. The rotation ratio of the upper shaft 7 and the transmission shaft 2 402 is 1:2. The thread hooking mechanism 4 also includes a transmission shaft 401 for transmitting motion. The transmission shaft 401 is rotatably connected to the inner wall of the casing 2. The gear ratio between the top and bottom ends of the transmission shaft 401 is 1:2. The top of the transmission shaft 401 is meshed with the output gear 302. When the upper shaft 7 rotates, the transmission shaft 401 rotates. When the upper shaft 7 rotates one circle, the transmission shaft 1 401 will be driven to rotate synchronously for one circle. The inner wall of the middle seat 5 is close to the bottom end of the transmission shaft 1 401 and is rotatably connected to the transmission shaft 2 402 for transmitting motion. The right end of the transmission shaft 2 402 is equipped with a transmission gear 1 403 for transmitting power. The left end of the transmission shaft 2 402 is equipped with a gear 404. The gear 403 at the right end of the transmission shaft 2 402 is meshed with the transmission shaft 1 401. Since the gear ratio between the top and bottom ends of the transmission shaft 1 401 is 1:2, when the upper shaft 7 rotates one circle, the transmission shaft 1 401 will drive the transmission shaft 2 402 to rotate two circles.

[0043] Reference Figure 2 - Figure 4 The transmission assembly 410 includes a gear seat 412 for supporting the rotation of the second rotating shaft 411. The gear seat 412 is fixedly connected to the inner wall of the middle seat 5. The front end of the gear seat 412 penetrates and is rotatably connected to the second rotating shaft 411 for transmitting motion. The front end of the second rotating shaft 411 is meshed with the gear 404. When the transmission gear 1 403 rotates one circle, the second rotating shaft 411 will also be driven to rotate one circle. The second rotating shaft 411 only changes the direction of motion without changing the transmission ratio. The second rotating shaft 411 only changes the direction of rotation from the original rotation of the transmission shaft 2 402 around the X axis to the rotation around the Y axis. The transmission ratio of the second rotating shaft 411 relative to the upper shaft 7 is still 2:1. The rear end of the second rotating shaft 411 is equipped with a gear for driving the synchronous belt 4 14 rotating synchronous pulley 1 413, synchronous pulley 1 413 is connected with synchronous pulley 2 415 through synchronous belt 414, when synchronous pulley 1 413 rotates, synchronous pulley 2 415 is driven to rotate synchronously through synchronous belt 414, and the two have the same direction and speed, the inner wall of the cross cylinder seat 421 passes through and is rotatably connected with a connecting shaft 418 for driving the driving gear 423 to rotate, synchronous pulley 2 415 is installed on the outer wall of the connecting shaft 418 near the rear end position, when synchronous pulley 2 415 rotates, it will drive the connecting shaft 418 to rotate synchronously, the connecting shaft 418 passes through and is fixedly connected to the inner wall of the driving gear 423, when the connecting shaft 418 rotates, it will drive the driving gear 423 to rotate synchronously.

[0044] Reference Figure 1 - Figure 3A cover shell 417 for protecting the synchronous belt 414 is installed at the rear end of the synchronous pulley 415, and a synchronous baffle 416 for blocking the synchronous belt 414 is installed at the connection between the cover shell 417 and the synchronous pulley 415. A bracket plate 425 for blocking the driving gear 423 is installed at the front end of the cross cylinder seat 421 near the front end of the driving gear 423, and a rotary hook positioning hook 426 for assisting in positioning the sewing thread is installed at the front end of the bracket plate 425 near the left end.

[0045] Reference Figure 1 and Figure 2 The needle bar assembly 3 also includes a swing needle driving gear 303 for driving the swing needle transmission shaft 305 to rotate, the inner wall of the casing 2 is rotatably connected to the swing needle transmission shaft 305 for driving the cam 306 to rotate, the outer wall of the swing needle transmission shaft 305 is fixedly connected to the cam 306 for driving the rocker arm 307 to swing, the outer wall of the swing needle transmission shaft 305 is fixedly connected to the rear end of the cam 306 for driving the swing needle transmission shaft 305 to rotate, the swing needle driven gear 304 is meshed with the swing needle driving gear 303, and the swing needle driven gear 304 rotates one circle will drive the swing needle driving gear 303 to rotate one circle, the bottom end of the casing 2 is slidably connected to a swing needle frame 308 for supporting the needle bar 301 to move up and down, the bottom end of the swing needle frame 308 is fixedly connected to the needle bar 301 for installing the sewing needle, and the front end of the swing needle frame 308 is fixedly connected to the rocker arm 307 for driving the swing needle frame 308 to move up and down. 7, a slider seat 311 is installed at the front end of the rocker arm 307, and the rocker arm 307 is connected to the cam 306 in a high pair. When the swing needle transmission shaft 305 rotates, it will drive the rocker arm 307 to move up and down through the cam 306. The left end of the upper shaft 7 is rotatably connected to the needle bar connecting rod 309 used to drive the swing needle frame 308 to swing back and forth. The needle bar connecting rod 309 is connected to the upper shaft 7 through an eccentric shaft. Therefore, when the upper shaft 7 rotates, it will drive the needle bar connecting rod 309 to form a circular trajectory. Swing, the left end of the needle bar connecting rod 309 is fixedly connected with a needle bar joint 310 for connecting the needle bar connecting rod 309 and the swing needle frame 308, and the front end of the needle bar joint 310 is fixedly connected to the rear end of the swing needle frame 308. When the needle bar connecting rod 309 swings, the needle bar 301 will be driven to move up and down through the needle bar joint 310, and the swing needle frame 308 will be driven to swing left and right with the rocker arm 307, so that the needle bar 301 can be swung up and down and left and right to form a Z-shaped sewing.

[0046] Reference Figure 3The upper cloth feeding assembly 6 includes a pressure rod 602 for supporting the inner presser foot 605 to move up and down. The pressure rod 602 is slidably connected to the inner wall of the casing 2. The inner wall of the casing 2 is slidably connected to a clamping rod 606 for supporting the swing presser foot 608 to move up and down near the left end of the pressure rod 602. The bottom end of the pressure rod 602 is fixedly connected to the inner presser foot 605 for fixing the sewing point. By using the inner presser foot 605 to squeeze the sewing part, the needle can be conveniently pierced. The clamping rod 606 The outer wall of 6 is fixedly connected with a swing presser foot 608 for driving the sewing object to move left and right, the outer wall of the clamping rod 606 is fixedly connected with a return spring 607 for pushing the clamping rod 606 to move downward, the top of the return spring 607 is fixedly connected to the inner wall of the casing 2, the outer wall of the pressure rod 1 602 is fixedly connected with a return spring 1 603 for pushing the pressure rod 1 602 to move downward and reset, and the top of the return spring 1 603 is fixedly connected to the inner wall of the casing 2.

[0047] Reference Figure 3The upper cloth feeding assembly 6 also includes a crank 1 601 for driving the second crank 604 to swing. The crank 1 601 is fixedly connected to the outer wall of the upper shaft 7. When the upper shaft 7 rotates, the crank 1 601 will be driven to rotate synchronously. The left end of the crank 1 601 is rotatably connected to the crank 2 604. When the crank 1 601 rotates around the upper shaft 7, the crank 2 604 will be driven to rotate and move. At the same time, the crank 1 601 will rotate relative to the crank 2 604. The left end of the crank 2 604 is rotatably connected to a triangular swing frame 619 for driving the inner presser foot 605 and the swing presser foot 608 to swing alternately. The right end of the triangular swing frame 619 is rotatably connected to the left end of the inner presser foot 605, and the top of the swing presser foot 608 is rotatably connected to the triangular swing frame 619. 9, when the swing presser foot 608 moves upward, it will squeeze the triangular swing frame 619 to make it rotate, so that the inner presser foot 605 can be driven to move downward, and the right end of the triangular swing frame 619 is rotatably connected to the left end of the casing 2 near the rear end position. When the triangular swing frame 619 rotates, it will swing around the connection between itself and the casing 2, and the outer wall of the upper shaft 7 is fixedly connected with a cam 617 for driving the transmission tooth fork 613 to swing, and the inner wall of the middle seat 5 is rotatably connected with a feed shaft 615 for transmitting the swing, and the outer wall of the feed shaft 615 is fixedly connected with a transmission crank 618 for connecting the transmission tooth fork 613 and the transmission connecting rod 614, and the outer wall of the transmission crank 618 is hinged with a cam 618 for driving the transmission crank 618 to actively The transmission fork 613 rotates, and the outer wall of the transmission crank 618 is hinged near the left end of the transmission fork 613 with a transmission connecting rod 614 for driving the swing shaft 609 to swing. The top of the transmission connecting rod 614 is hinged with the swing shaft 609 for driving the crank three 610 to swing. The transmission fork 613 is connected to the cam two 617 as a high pair. When the cam two 617 is driven to rotate by the upper shaft 7, the cam two 617 will squeeze the transmission fork 613 to swing back and forth. The left end of the swing shaft 609 is fixedly connected with the crank three 610 for transmitting the swing. The right end of the crank three 610 is rotatably connected with the crank four 611 for driving the swing presser foot 608 to swing. The right end of the crank four 611 is fixedly connected to the left end of the swing presser foot 608. When the swing shaft 609 swings, it will drive the crank four 611 to swing through the crank three 610, and the crank four 611 will drive the swing presser foot 608 to swing. At the same time, with the up and down movement of the swing presser foot 608, the swing presser foot 608 can swing around an arc trajectory. The front end of the casing 2 is close to the right end of the transmission tooth fork 613 and is equipped with a stitch adjustment knob 616 for adjusting the fixed position of the transmission tooth fork 613. The inner wall of the auxiliary wheel groove 4211 is rotatably connected to the auxiliary cloth feeding wheel 612 for assisting the movement of the sewn object. The upper cloth feeding assembly 6 is a prior art and has not been modified in this case. It is simply applied to the prior art. Therefore, this case does not provide a detailed description of this part of the structure.

[0048] This embodiment also provides a method for using a small horizontal cylinder detachable zigzag sewing machine, comprising the following steps:

[0049] S1: a preparation step, wherein the opening of the children's shoes to be sewn is sleeved on the outer wall of the horizontal cylinder seat 421 , and the sewing position of the opening is aligned with the bottom end of the needle rod 301 .

[0050] S2: Puncture step, start the motor to drive the upper shaft 7 to rotate, and when the upper shaft 7 rotates, it drives the needle bar 301 to swing back and forth through the swing needle driving gear 303. The rotation of the swing needle driven gear 304 drives the swing needle transmission shaft 305 to rotate, and the rotation of the swing needle transmission shaft 305 drives the rocker arm 1 307 to move up and down through the cam 1 306. The right end of the rocker arm 1 307 cooperates with the slider seat 311. Changing the inclination angle of the slider seat 311 can change the left and right position movement of the rocker arm 1 307, thereby driving the swing needle frame 308 to reciprocate left and right. The swing of the swing needle frame 308 can make the needle bar 301 swing left and right, so that the machine needle can swing back and forth perpendicular to the feeding direction to produce a zigzag stitch.

[0051] S3: Feeding step. When the upper shaft 7 rotates, it will drive the crank 1 601 to swing. The swing of crank 1 601 will drive crank 2 604 to swing. At the same time, crank 1 601 and crank 2 604 will swing relative to each other. The swing of crank 2 604 will drive the triangular swing frame 619 to swing. The triangular swing frame 619 will drive the swinging presser foot 608 and the inner presser foot 605 to move up and down alternately. At the same time, when the upper shaft 7 rotates, it will drive the cam 2 617 to rotate. The rotation of cam 2 617 will drive the transmission fork 613 to swing. Adjusting the stitch length adjustment knob 616 can change the up and down swing amount of the transmission fork 613. The swing of the transmission fork 613 will cause the transmission crank 618 installed on the feed shaft 615 to swing, thereby driving the transmission connecting rod 614 to swing synchronously. When the transmission connecting rod 614 swings, it will drive the swing shaft 609 to swing. The swing of the swing shaft 609 will drive the crank three 610 to swing. The swing of crank three 610 can drive the swing presser foot 608 to swing. At the same time, with the alternating up and down movement of the inner presser foot 605, the swing presser foot 608 can reciprocate in an elliptical arc. In this way, during the sewing process, the arc-shaped swing of the swing presser foot 608 can drive the movement of the sewing object.

[0052] S4: Sewing step. When the upper shaft 7 rotates, it will drive the transmission shaft 1 401 to rotate through the output gear 1 302. The rotation of the transmission shaft 1 401 will drive the transmission shaft 2 402 to rotate through the meshing of the gear and the transmission gear 1 403. When the transmission shaft 2 402 rotates, it will drive the rotating shaft 2 411 to rotate through the gear 404 at the left end. The rotation of the rotating shaft 2 411 can drive the synchronous pulley 1 413 to rotate. The rotation of the synchronous pulley 1 413 will drive the synchronous pulley 2 415 to rotate synchronously with it through the synchronous belt 414. The rotation of the synchronous pulley 2 415 will drive the driving gear 423 to rotate synchronously through the connecting shaft 418. The rotation of the driving gear 423 will drive the driven gear 422 to rotate. The rotation of the driven gear 422 can drive the rotary shuttle assembly 424 to rotate. The rotation of the rotary shuttle assembly 424 cooperates with the up and down movement of the needle bar 301 to achieve sewing operations.

[0053] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A small horizontal cylinder detachable zigzag sewing machine and method, comprising a base (1), a middle seat (5) is installed on the top of the base (1), a casing (2) is installed on the top of the middle seat (5), an upper shaft (7) is installed on the right end of the casing (2), and the upper shaft (7) can be driven by a motor and a belt, characterized in that: A needle bar assembly (3) is installed on the inner wall of the casing (2); an upper cloth feeding assembly (6) is installed on the inner wall of the casing (2) near the left end of the needle bar assembly (3); a thread hooking mechanism (4) is installed on the left end of the middle seat (5); the thread hooking mechanism (4) comprises a transmission assembly (410) and a horizontal cylinder assembly (420); the horizontal cylinder assembly (420) comprises a horizontal cylinder seat (421); the right end of the horizontal cylinder seat (421) is fixedly connected to the left end of the middle seat (5); a passive gear (422) is installed on the inner wall of the horizontal cylinder seat (421) near the left end; a driving gear (423) is installed on the inner wall of the horizontal cylinder seat (421) near the right end; the passive gear (422) and the driving gear (423) are meshed with each other; a rotary shuttle assembly (424) is installed at the front end of the passive gear (422).

2. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 1, characterized in that: The needle bar assembly (3) includes an output gear 1 (302), and the output gear 1 (302) is fixedly connected to the outer wall of the upper shaft (7). The thread hooking mechanism (4) also includes a transmission shaft 1 (401), and the transmission shaft 1 (401) is rotatably connected to the inner wall of the casing (2). The top of the transmission shaft 1 (401) is meshed with the output gear 1 (302). The inner wall of the middle seat (5) is rotatably connected to the bottom end of the transmission shaft 1 (401). The right end of the transmission shaft 2 (402) is equipped with a transmission gear 1 (403), and the left end of the transmission shaft 2 (402) is equipped with a gear (404). The gear (403) at the right end of the transmission shaft 2 (402) is meshed with the transmission shaft 1 (401).

3. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 2, characterized in that: The transmission assembly (410) comprises a gear seat (412), wherein the gear seat (412) is fixedly connected to the inner wall of the middle seat (5), the front end of the gear seat (412) passes through and is rotatably connected to a second rotating shaft (411), the front end of the second rotating shaft (411) is meshed with the gear (404), the rear end of the second rotating shaft (411) is installed with a synchronous pulley (413), the synchronous pulley (413) is connected to a second synchronous pulley (415) through a synchronous belt (414), the inner wall of the cross cylinder seat (421) passes through and is rotatably connected to a connecting shaft (418), the second synchronous pulley (415) is installed on the outer wall of the connecting shaft (418) near the rear end, and the connecting shaft (418) passes through and is fixedly connected to the inner wall of the driving gear (423).

4. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 3, characterized in that: A cover shell (417) is installed at the rear end of the synchronous pulley 2 (415), and a synchronous baffle (416) is installed at the connection between the cover shell (417) and the synchronous pulley 2 (415). A support plate (425) is installed at the front end of the horizontal cylinder seat (421) near the front end of the driving gear (423), and a rotary shuttle positioning hook (426) is installed at the front end of the support plate (425) near the left end.

5. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 1, characterized in that: The needle bar assembly (3) also includes a swing needle driving gear (303), the inner wall of the housing (2) is rotatably connected to a swing needle transmission shaft (305), the outer wall of the swing needle transmission shaft (305) is fixedly connected to a cam 1 (306), the outer wall of the swing needle transmission shaft (305) is fixedly connected to a swing needle driven gear (304) near the rear end of the cam 1 (306), the swing needle driven gear (304) and the swing needle driving gear (303) are meshed with each other, the bottom end of the housing (2) is slidably connected to a swing needle frame (308), and the swing needle transmission shaft (305) is fixedly connected to a cam 1 (306). The bottom end of the needle frame (308) is fixedly connected to a needle bar (301), the front end of the swing needle frame (308) is fixedly connected to a rocker arm 1 (307), the rocker arm 1 (307) and the cam 1 (306) are connected in a high pair, a slider seat (311) is installed at the front end of the rocker arm 1 (307), the left end of the upper shaft (7) is rotatably connected to a needle bar connecting rod (309), the left end of the needle bar connecting rod (309) is fixedly connected to a needle bar joint (310), and the front end of the needle bar joint (310) is fixedly connected to the rear end of the swing needle frame (308).

6. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 1, characterized in that: The upper cloth feeding assembly (6) comprises a pressure rod 1 (602), wherein the pressure rod 1 (602) is slidably connected to the inner wall of the casing (2), and a clamping rod 2 (606) is slidably connected to the inner wall of the casing (2) near the left end of the pressure rod 1 (602), and the bottom end of the pressure rod 1 (602) is fixedly connected to an inner presser foot (605), and the outer wall of the clamping rod 2 (606) is fixedly connected to a swing presser foot (608), and the outer wall of the clamping rod 2 (606) is fixedly connected to a return spring 2 (607), and the top end of the return spring 2 (607) is fixedly connected to the inner wall of the casing (2), and the outer wall of the pressure rod 1 (602) is fixedly connected to a return spring 1 (603), and the top end of the return spring 1 (603) is fixedly connected to the inner wall of the casing (2).

7. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 6, characterized in that: The upper cloth feeding assembly (6) further comprises a crank 1 (601), wherein the crank 1 (601) is fixedly connected to the outer wall of the upper shaft (7), the left end of the crank 1 (601) is rotatably connected to a crank 2 (604), the left end of the crank 2 (604) is rotatably connected to a triangular swing frame (619), the right end of the triangular swing frame (619) is rotatably connected to the left end of an inner presser foot (605), the top end of the swing presser foot (608) is rotatably connected to the front end of the triangular swing frame (619), the right end of the triangular swing frame (619) is rotatably connected to the left end of the casing (2) near the rear end, the outer wall of the upper shaft (7) is fixedly connected to a cam 2 (617), the inner wall of the middle seat (5) is rotatably connected to A feeding shaft (615), the outer wall of the feeding shaft (615) is fixedly connected with a transmission crank (618), the outer wall of the transmission crank (618) is hinged with a transmission tooth fork (613), the outer wall of the transmission crank (618) is hinged with a transmission connecting rod (614) near the left end of the transmission tooth fork (613), the top end of the transmission connecting rod (614) is hinged with a swing shaft (609), the transmission tooth fork (613) and the cam two (617) are connected in a high pair, the left end of the swing shaft (609) is fixedly connected with a crank three (610), the right end of the crank three (610) is rotatably connected with a crank four (611), and the right end of the crank four (611) is fixedly connected to the left end of the swing presser foot (608).

8. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 7, characterized in that: A needle distance adjustment knob (616) is installed at the front end of the casing (2) close to the right end of the transmission tooth fork (613).

9. A small horizontal cylinder detachable zigzag sewing machine and method according to claim 1, characterized in that: The rear end of the rotary shuttle assembly (424) is provided with a bolt hole (4243), the front end of the passive gear (422) is provided with a fixing hole (4221), the fixing hole (4221) and the bolt hole (4243) are matched with each other, the top end of the transverse cylinder seat (421) is provided with an auxiliary wheel groove (4211), the top end of the transverse cylinder seat (421) is provided with a needle hole groove (4212) near the front end of the auxiliary wheel groove (4211), the inner wall of the rotary shuttle assembly (424) is fixedly connected to the inner pot (4241), the outer wall of the rotary shuttle assembly (424) is fixedly connected to the outer pot (4242), and the inner wall of the auxiliary wheel groove (4211) is rotatably connected to the auxiliary cloth feeding wheel (612).

10. The method for using a small horizontal cylinder detachable zigzag sewing machine according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: a preparation step, wherein the opening of the children's shoes to be sewn is sleeved on the outer wall of the horizontal cylinder seat (421), and the sewing position of the opening is aligned with the bottom end of the needle bar (301). S2: Puncture step, start the motor to drive the upper shaft (7) to rotate, and when the upper shaft (7) rotates, it will drive the needle bar (301) to swing back and forth through the swing needle driving gear (303). The rotation of the swing needle driven gear (304) will drive the swing needle transmission shaft (305) to rotate, and the rotation of the swing needle transmission shaft (305) will drive the rocker arm (307) to move up and down through the cam (306). The right end of the rocker arm (307) cooperates with the slider seat (311). Changing the inclination angle of the slider seat (311) can change the left and right position movement of the rocker arm (307), thereby driving the swing needle frame (308) to reciprocate left and right. The swing of the swing needle frame (308) can make the needle bar (301) swing left and right, so that the machine needle can swing back and forth along a direction perpendicular to the feeding direction to produce a zigzag stitch. S3: feeding step, when the upper shaft (7) rotates, it will drive the crank 1 (601) to swing, and the swing of crank 1 (601) will drive the crank 2 (604) to swing, and at the same time, crank 1 (601) and crank 2 (604) will swing relative to each other, and the swing of crank 2 (604) will drive the triangular swing frame (619) to swing, and the triangular swing frame (619) will drive the swing presser foot (608) and the inner presser foot (605) to move up and down alternately, and at the same time, when the upper shaft (7) rotates, it will drive the cam 2 (617) to rotate, and the rotation of the cam 2 (617) will drive the transmission tooth fork (613) to swing, and adjusting the stitch length adjustment knob (616) can change the up and down swing amount of the transmission tooth fork (613). The swing of the transmission tooth fork (613) will cause the transmission crank (618) installed on the feeding shaft (615) to swing, thereby driving the transmission connecting rod (614) to swing synchronously. When the transmission connecting rod (614) swings, it will drive the swing shaft (609) to swing. The swing of the swing shaft (609) will drive the crank three (610) to swing. The swing of the crank three (610) can drive the swinging presser foot (608) to swing. At the same time, in conjunction with the up and down alternating movement of the inner presser foot (605), the swinging presser foot (608) can be made to reciprocate in an elliptical arc. In this way, during the sewing process, the arc-shaped swing of the swinging presser foot (608) can drive the movement of the sewn object. S4: Sewing step, when the upper shaft (7) rotates, it drives the transmission shaft (401) to rotate through the output gear (302), and the rotation of the transmission shaft (401) drives the transmission shaft (402) to rotate through the meshing of the gear (404) and the transmission gear (403), and when the transmission shaft (402) rotates, it drives the rotation shaft (411) to rotate through the gear (404) at the left end, and the rotation of the rotation shaft (411) can drive the synchronous pulley (413) to rotate, and the synchronous pulley (413) The rotation of (413) will drive the synchronous pulley (415) to rotate synchronously with the synchronous belt (414). The rotation of the synchronous pulley (415) will drive the driving gear (423) to rotate synchronously through the connecting shaft (418). The rotation of the driving gear (423) will drive the driven gear (422) to rotate. The rotation of the driven gear (422) can drive the rotary shuttle assembly (424) to rotate. The rotation of the rotary shuttle assembly (424) cooperates with the up and down movement of the needle bar (301) to achieve sewing operation.

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