Embroidery machine head

Abstract

The invention discloses a head for an embroidery machine, comprising a head main shaft, a plurality of bearing seats, a balancing block, a cantilever body, a needle bar frame provided with a needle bar assembly, a presser foot assembly and a thread take-up rod assembly, a thread take-up rod transmission assembly, a needle bar transmission assembly and a presser foot transmission assembly. The head main shaft is arranged on the cantilever body through the bearing seat, a balancing block is arranged on the head main shaft, the front end of the cantilever body is provided with a needle bar frame through a slideway, the front end of the cantilever body is provided with a color-changing driving mechanism for driving the needle bar frame, the head main shaft drives the thread take-up rod transmission assembly, the needle bar transmission assembly and the presser foot transmission assembly. Compared with the prior art, vibration and noise can be reduced, the use is convenient, and the stability and work efficiency are improved.

Description

Technical field

[0001] The present invention relates to the technical field of embroidery machines, in particular to the technical field of a head for an embroidery machine. [Background Technology]

[0002] Embroidery machine, also known as computer embroidery machine, is the most advanced embroidery machine in contemporary times. It can make traditional hand embroidery be achieved with high speed and high efficiency, and can also achieve the requirements of "multi-level, multi-function, unity and perfection" that hand embroidery cannot achieve. It is an electromechanical product that embodies multiple high-tech. As computer embroidery replaces hand embroidery, computer embroidery machine will also become the main machine type in the embroidery industry.

[0003] Nowadays, computer embroidery machines are no longer exclusive to factories. There are many small computer embroidery machines for home use on the market to meet people's home embroidery needs. However, the existing small computer embroidery machines have large vibrations and noises when in use, which affects people's mood for home embroidery. In addition, they are inconvenient to use, have poor stability, and their work efficiency needs to be improved. [Summary of the invention]

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide an embroidery machine head that can reduce vibration and noise, is easy to use, and improves stability and work efficiency.

[0005] To achieve the above-mentioned objectives, the present invention proposes an embroidery machine head, comprising a head spindle, several bearing seats, a balancing block, a cantilever body, a needle bar frame provided with a needle bar assembly, a presser foot assembly and a thread take-up rod assembly, a thread take-up rod transmission assembly, a needle bar transmission assembly and a presser foot transmission assembly, the head spindle is arranged on the cantilever body through the bearing seat, the head spindle is provided with a balancing block, the front end of the cantilever body is provided with a needle bar frame through a slide, the front end of the cantilever body is provided with a color-changing drive mechanism for driving the needle bar frame, the head spindle drives the thread take-up rod transmission assembly, the needle bar transmission assembly and the presser foot transmission assembly, the needle bar frame is provided with a center line passing device and an isolation mechanism, the isolation mechanism comprises an upper mounting plate located above the center line passing device and a lower mounting plate located below the center line passing device, the upper mounting plate is provided with an insert that is detachably fixed and separates the upper and lower line passing areas of the center line passing device from the outside world.

[0006] Preferably, the color-changing drive mechanism includes a color-changing motor, a color-changing cam, a plurality of color-changing rollers and a rotation sensor. The color-changing cam is provided on the rotating shaft of the color-changing motor, and the needle bar frame is provided with color-changing rollers that are evenly spaced and matched with the threaded cam grooves of the color-changing cam. The rotation sensor is connected to the rotating shaft of the color-changing motor.

[0007] Preferably, the rear end of the machine head spindle is provided with two bearing seats and a synchronous pulley, an optical coupling sensor plate and an angle indicator ring located between the two bearing seats and arranged in sequence from front to back. It also includes an angle pointer cooperating with the angle indicator ring and an optical coupling sensor cooperating with the optical coupling sensor plate. The front end of the machine head spindle is provided with a main drive cam, a bearing seat, a balance block and a pressure foot cam in sequence from front to back.

[0008] Preferably, the presser foot transmission assembly includes a presser foot assembly driving seat, a connecting rod I, a rotating shaft I, a connecting rod II and a connecting rod III, the rear end of the rotating shaft I is connected to the roller in the cam groove of the presser foot cam through the connecting rod I, the front end of the rotating shaft I is connected to one end of the connecting rod III through the connecting rod II, the other end of the connecting rod III is connected to the presser foot assembly driving seat, and the presser foot assembly driving seat is sleeved on two guide rods fixed in the front end of the cantilever body, the needle bar transmission assembly includes a connecting rod IV and a needle bar assembly driving seat, one end of the connecting rod IV is eccentrically connected to the front end of the main driving cam, and the other end is connected to the needle bar assembly driving seat slidably arranged on the two guide rods, the thread take-up lever transmission assembly includes a connecting rod V, a rotating shaft II, a swing arm and a roller, one end of the rotating shaft II is connected to the roller in the cam groove on the circumferential surface of the main driving cam through the connecting rod V, and the other end of the rotating shaft II is provided with a swing arm, and the swing arm is provided with a roller that matches the connecting groove of the thread take-up lever assembly.

[0009] Preferably, the presser foot assembly driving seat includes a transmission slider, two sliding sleeves, an input transmission rod and an output transmission body, the transmission slider is provided with two guide holes, the guide holes are each provided with a sliding sleeve, the sliding sleeve is passed through a guide rod, the front end of the transmission slider is inserted with an input transmission rod fixedly connected to the transmission slider by a fixing screw, the rear end of the transmission slider is provided with an output transmission body, the front end of the input transmission rod is provided with a blind hole, the blind hole is provided with oil-conducting wool felt, the circumference of the input transmission rod is provided with a number of oil outlet holes connected with the blind holes, the output transmission body is provided with a buffer block, the central axes of the working ends of the input transmission rod and the buffer block are both located between the central axes of the two guide rods, and the input transmission rod is provided with a groove for tightening the input transmission rod with a fixing screw.

[0010] Preferably, the insert includes a block body and a plug-in slot body, the lower mounting plate is provided with a partition that corresponds one-to-one to the plug-in slot body and is inserted into the plug-in slot body, the upper end of the block body is provided with an elastic snap buckle, the lower front end of the block body is provided with a positioning hook, the upper front end of the block body is provided with a positioning body, the right side of the block body is provided with a wire groove, the upper mounting plate is provided with slots I, II and III that respectively cooperate with the elastic snap buckle, the positioning body and the positioning hook, the upper mounting plate is provided with slots that correspond one-to-one to and cooperate with the thread take-up rod, and side covers are provided at both ends of the upper mounting plate.

[0011] Preferably, the center wire passing device includes a support body, a wire passing spacer and a tension adjusting device. The support body is provided with a wire passing spacer and a tension adjusting device located below the wire passing spacer. The wire passing spacer includes wire passing spaces arranged in sequence from front to back. The tension adjusting device includes a wire passing torsion spring and a wire passing rod corresponding one to one to the wire passing spaces. The free end of the wire passing torsion spring is formed with a wire passing hook, and the wire passing rod is located below the wire passing hook.

[0012] Preferably, the tension adjustment device also includes a connecting shaft, a plurality of torsion spring sleeves, a mounting sleeve and an adjustment mechanism. The connecting shaft can be rotatably arranged on the connecting ears at both ends of the support body. The fixed sleeve on the connecting shaft between the two connecting ears is provided with a mounting sleeve and a torsion spring sleeve located behind the mounting sleeve. Each torsion spring sleeve is provided with a wire-passing torsion spring, one end of the wire-passing torsion spring is fixedly connected to the torsion spring sleeve, and the other free end extends out of the slot on the torsion spring sleeve. The rear end of the connecting shaft is provided with an adjustment mechanism fixedly connected to the rear connecting ear, and the wire-passing barrier also includes a connecting seat integrally formed with all the wire-passing barriers, and the free end of the wire-passing barrier is provided with a plug-in portion inserted into the plug-in slot body.

[0013] Preferably, the adjusting mechanism includes a fixed gear sleeve, a movable gear sleeve, a spring, an adjustment handle and a limit sleeve, and the rear end of the connecting shaft is sequentially sleeved with an adjusting handle, a limit sleeve, a spring and a movable gear sleeve from back to front, and the front end of the movable gear sleeve is provided with a sleeve body located between the connecting shaft and the rear connecting ear, and the sleeve body is sleeved with a fixed gear sleeve fixedly connected to the rear connecting ear, and a gap is provided between the rear end of the movable gear sleeve and the limit sleeve, and the rear end of the fixed gear sleeve is meshed with the front end of the movable gear sleeve, and the movable gear sleeve and the mounting sleeve are provided with a wire rod, and the wire rod is slidably connected to the movable gear sleeve, and the screwing part of the adjusting handle is located outside the side cover, and the adjusting handle and the limit sleeve are fixedly connected to the connecting shaft, and the rear end of the adjusting handle is provided with a fixed hole cover.

[0014] Preferably, it also includes a wire device arranged on the lower mounting plate and located below the partition, the wire mechanism including a wire rod, a seat body and a fixed elastic clip, the rear end of the wire rod is rotatably connected to the mounting seat body, the front end of the wire rod is detachable from the fixed connection with the fixed elastic clip, the side cover is provided with a avoidance groove for avoiding the wire rod, the fixed elastic clip includes a base, a groove and two elastic card bodies, the base is provided with a groove matching the front end of the wire rod, the base is provided with elastic card bodies on both sides of the groove for clamping the front end of the wire rod, the elastic card body includes a main body, an inclined clamping portion is formed at one end of the main body close to the groove, and the free end of the clamping portion is bent outward to form an inclined introduction portion.

[0015] The beneficial effects of the present invention are as follows: the present invention provides two guide holes on the transmission slide, each of which is provided with a sliding sleeve, and each of which is provided with a guide rod, thereby adopting double guide holes, which can improve service life, operational stability and reliability; an input transmission rod fixedly connected to the transmission slide by a fixing screw is inserted into the front end of the transmission slide, which makes the processing of the transmission slide and the input transmission rod simpler, thereby improving the processing accuracy and assembly accuracy of each part; the central axis of the working end of the input transmission rod and the buffer block is located between the central axes of the two guide rods, so that the force on the presser foot transmission assembly is reasonable, the overturning moment is small, the operational stability is improved, and the noise is reduced;

[0016] The upper mounting plate is provided with a detachable fixed connection that separates the upper and lower thread-passing areas of the middle thread-passing device from the outside world. The insert is used to separate each embroidery thread from the outside world to prevent the influence of external factors on the embroidery thread, thereby improving safety and thread-passing stability. The insert is detachably fixed to the upper mounting plate and can be removed individually without affecting other embroidery threads. The independent insert design combined with the open design of the middle thread-passing device can realize more convenient manual thread routing (Note: there is no need to remove the insert when threading, and the embroidery thread can slide between the partition and the plug-in slot body); the plug-in part and the partition are inserted into the plug-in slot body to ensure that the embroidery thread will not be thrown out of the specified area during the embroidery process due to the tension and relaxation of the embroidery thread; the free end of the thread torsion spring is formed into a thread-passing hook, and the thread-passing barrier, the guide wire device and the thread-passing rod cooperate to eliminate the traditional thread-passing hole, which can simplify threading and improve work efficiency;

[0017] The machine head spindle is set on the cantilever body through several bearing seats. The machine head spindle is provided with a balancing block. According to the load and rotational inertia eccentricity distribution of the machine head spindle, bearing seats are set at multiple points for support to increase the support rigidity and rotational stability of the machine head spindle. Balancing blocks are added at appropriate positions to balance the load and the influence of the rotational inertia eccentricity caused by the mass eccentric parts to achieve dynamic balancing effect, so that the machine can still work stably at high speed with basically no vibration. The combination of the angle indicator ring and the angle pointer facilitates installation, maintenance and debugging.

[0018] Compared with the existing technology, the invention can reduce vibration and noise, is easy to use, and improves stability and work efficiency.

[0019] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings.

Brief Description of the Drawings

[0020] Figure 1 It is a structural schematic diagram of an embroidery machine head of the present invention;

[0021] Figure 2 1. It is a structural diagram of the color-changing drive mechanism;

[0022] Figure 3It is a partial structural schematic diagram of an embroidery machine head of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the presser foot assembly drive seat;

[0024] Figure 5 yes Figure 4 Cross-sectional view of AA;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure in which the center thread passing device and the isolation mechanism are arranged on the needle bar frame;

[0026] Figure 7 yes Figure 6 Side view with some of the inserts removed;

[0027] Figure 8 yes Figure 7 Cross-sectional view of CC;

[0028] Figure 9 This is the installation diagram of the upper mounting plate and the insert;

[0029] Figure 10 It is a structural diagram of the insert;

[0030] Figure 11 It is a structural diagram of the wire torsion spring;

[0031] Figure 12 It is a structural diagram of the center line device;

[0032] Figure 13 It is a partial cross-sectional view of the center line device;

[0033] Figure 14 2. It is a structural diagram of a fixed elastic buckle;

[0034] Figure 15 It is a structural diagram of the wire mechanism.

[0035] In the figure: 41-head spindle, 42-bearing seat, 43-balance block, 44-cantilever body, 45-needle bar frame, 46-thread take-up rod transmission assembly, 47-needle bar transmission assembly, 48-presser foot transmission assembly, 49-main drive cam, 50-middle thread passing device, 60-isolation mechanism, 70-color change drive mechanism, 80-embroidery thread, 410-presser foot cam, 411-guide rod, 412-angle indicator ring, 413-angle pointer, 414-photocoupler sensor, 415-photocoupler sensor, 416-synchronous pulley, 417-slide, 418-connecting slot, 701-color change motor, 70 2-color-changing cam, 703-color-changing roller, 704-rotation sensor, 461-connecting rod V, 462-rotating shaft II, 463-swing arm, 464-roller, 471-connecting rod IV, 472-needle bar assembly drive seat, 480-presser foot assembly drive seat, 481-connecting rod I, 482-rotating shaft I, 483-connecting rod II, 484-connecting rod III, 4801-transmission slider, 4802-sliding sleeve, 4803-input transmission rod, 4804-output transmission body, 4805-groove, 4806-blind hole, 4807-oil-conducting wool felt, 4808-oil outlet hole , 4809-buffer block, 48010-fixing screw, 50-middle wire passing device, 61-upper mounting plate, 62-insert, 63-lower mounting plate, 64-partition, 65-slot, 66-side cover, 611-slot I, 612-slot II, 613-slot III, 621-block body, 622-plug slot body, 623-elastic buckle, 624-positioning hook, 625-positioning body, 626-wire passing slot, 51-support body, 52-wire passing spacer, 53-tension adjusting device, 531-wire passing torsion spring, 532-wire passing rod, 533-connecting shaft, 534-torsion spring Sleeve, 535-fixed gear sleeve, 536-movable gear sleeve, 537-spring, 538-adjustment handle, 539-limit sleeve, 5310-installation sleeve, 5311-slot hole, 5312-gap, 5313-sleeve body, 5314-fixed hole cover, 521-wire barrier, 522-connecting seat, 53110-wire hook, 500-wire mechanism, 501-wire rod, 502-seat body, 503-fixed elastic buckle, 5031-base, 5032-groove, 5033-elastic card body, 50331-main body, 50332-clamping part, 50333-introduction part. [Specific implementation method]

[0036] See Figures 1 to 15The present invention provides an embroidery machine head, comprising a head spindle 41, a plurality of bearing seats 42, a balancing block 43, a cantilever body 44, a needle bar frame 45 provided with a needle bar assembly, a presser foot assembly and a thread take-up rod assembly, a thread take-up rod transmission assembly 46, a needle bar transmission assembly 47 and a presser foot transmission assembly 48. The head spindle 41 is arranged on the cantilever body 44 through the bearing seat 42, the head spindle 41 is provided with a balancing block 43, the front end of the cantilever body 44 is provided with a needle bar frame 45 through a slide 417, the front end of the cantilever body 44 is provided with a color changing drive mechanism 70 for driving the needle bar frame 45, the head spindle 41 drives the thread take-up rod transmission assembly 46, the needle bar transmission assembly 47 and the presser foot transmission assembly 48, and the needle bar frame 45 is provided with a center thread passing device 50 And an isolation mechanism 60, the isolation mechanism 60 includes an upper mounting plate 61 located above the middle line-passing device 50 and a lower mounting plate 63 located below the middle line-passing device 50, the upper mounting plate 61 is provided with a plug 62 that is detachably fixed and separates the upper and lower line-passing areas of the middle line-passing device 50 from the outside world, the color-changing drive mechanism 70 includes a color-changing motor 701, a color-changing cam 702, a plurality of color-changing rollers 703 and a rotation sensor 704, the color-changing motor 701 is provided with a color-changing cam 702 on its rotating shaft, the needle bar frame 45 is provided with color-changing rollers 703 that are evenly spaced and matched with the threaded cam groove of the color-changing cam 702, the rotation sensor 704 is connected to the rotating shaft of the color-changing motor 701, the machine head The rear end of the main shaft 41 is provided with two bearing seats 42 and a synchronous pulley 416, an optical coupling sensor 414 and an angle indicator ring 412 located between the two bearing seats 42 and arranged in sequence from front to back. It also includes an angle pointer 413 that cooperates with the angle indicator ring 412 and an optical coupling sensor 415 that cooperates with the optical coupling sensor 414. The front end of the head main shaft 41 is provided with a main drive cam 49, a bearing seat 42, a balance block 43 and a presser foot cam 410 in sequence from front to back. The presser foot transmission assembly 48 includes a presser foot assembly drive seat 480, a connecting rod I481, a rotating shaft I482, a connecting rod II483 and a connecting rod III484. The rear end of the rotating shaft I482 is connected to the cam of the presser foot cam 410 through the connecting rod I481. The roller in the wheel groove is connected, the front end of the rotating shaft I482 is connected to one end of the connecting rod III484 through the connecting rod II483, and the other end of the connecting rod III484 is connected to the presser foot assembly driving seat 480, and the presser foot assembly driving seat 480 is sleeved on two guide rods 411 fixed in the front end of the cantilever body 44. The needle bar transmission assembly 47 includes a connecting rod IV471 and a needle bar assembly driving seat 472, one end of the connecting rod IV471 is eccentrically connected to the front end of the main driving cam 49, and the other end is connected to the needle bar assembly driving seat 472 slidably provided on the two guide rods 411. The thread take-up lever transmission assembly 46 includes a connecting rod V461, a rotating shaft II462, a swing arm 463 and a roller 464.One end of the rotating shaft II462 is connected to the roller in the cam groove on the circumference of the main driving cam 49 through the connecting rod V461, and the other end of the rotating shaft II462 is provided with a swing arm 463, and the swing arm 463 is provided with a roller 464 that matches the connecting groove 418 of the thread take-up lever assembly. The presser foot assembly driving seat 480 includes a transmission slider 4801, two sliding sleeves 4802, an input transmission rod 4803 and an output transmission body 4804, and two guide holes are provided on the transmission slider 4801, and sliding sleeves 4802 are provided in the guide holes, and guide rods 411 are passed through the sliding sleeves 4802. The front end of the transmission slider 4801 is inserted with a screw fixedly connected to the transmission slider 4801 by fixing screws 48010. An input transmission rod 4803 is provided at the rear end of the transmission slider 4801 with an output transmission body 4804. A blind hole 4806 is provided at the front end of the input transmission rod 4803, and an oil-conducting wool felt 4807 is provided in the blind hole 4806. The peripheral surface of the input transmission rod 4803 is provided with a plurality of oil outlet holes 4808 connected to the blind holes 4806. A buffer block 4809 is provided on the output transmission body 4804. The central axes of the working ends of the input transmission rod 4803 and the buffer block 4809 are both located between the central axes of the two guide rods 411. A groove 4805 for tightening the input transmission rod 4803 with a fixing screw 48010 is provided on the input transmission rod 4803. The insert 62 includes a block body 621 and an inserting slot body. 622, the lower mounting plate 63 is provided with a partition 64 which corresponds to the plug-in slot 622 and is inserted into the plug-in slot 622, the upper end of the blocking body 621 is provided with an elastic buckle 623, the lower front end of the blocking body 621 is provided with a positioning hook 624, the upper front end of the blocking body 621 is provided with a positioning body 625, the right side of the blocking body 621 is provided with a wire groove 626, the upper mounting plate 61 is provided with a slot I611, a slot II612 and a slot III613 which respectively cooperate with the elastic buckle 623, the positioning body 625 and the positioning hook 624, the upper mounting plate 61 is provided with a notch 65 which corresponds to and cooperates with the thread take-up rod, and side covers 66 are provided at both ends of the upper mounting plate 61. The middle wire passing device 50 includes a support A seat body 51, a wire-passing barrier 52 and a tension adjustment device 53. The seat body 51 is provided with a wire-passing barrier 52 and a tension adjustment device 53 located below the wire-passing barrier 52. The wire-passing barrier 52 includes wire-passing barriers 521 arranged in sequence from front to back. The tension adjustment device 53 includes a wire-passing torsion spring 531 and a wire-passing rod 532 corresponding to the wire-passing barriers 521. The free end of the wire-passing torsion spring 531 is formed with a wire-passing hook 53110. The wire-passing rod 532 is located below the wire-passing hook 53110. The tension adjustment device 53 also includes a connecting shaft 533, a plurality of torsion spring sleeves 534, a mounting sleeve 5310 and an adjustment mechanism. The connecting shaft 533 can be rotatably arranged on the connecting ears 511 at both ends of the seat body 51.The connecting shaft 533 between the two connecting ears 511 is fixedly sleeved with a mounting sleeve 5310 and a torsion spring sleeve 534 located behind the mounting sleeve 5310. Each torsion spring sleeve 534 is provided with a wire-passing torsion spring 531. One end of the wire-passing torsion spring 531 is fixedly connected to the torsion spring sleeve 534, and the other free end extends out of the slot 5311 on the torsion spring sleeve 534. The rear end of the connecting shaft 533 is provided with an adjustment mechanism fixedly connected to the rear connecting ear 511. The adjustment mechanism includes a fixed gear sleeve 535, a movable gear sleeve 536, a spring 537, an adjustment handle 538 and a limit sleeve 539. The rear end of the connecting shaft 533 is sleeved with an adjustment handle 538, a limit sleeve 539 in sequence from back to front. The sleeve 539, the spring 537 and the movable gear sleeve 536, the front end of the movable gear sleeve 536 is provided with a sleeve body 5313 located between the connecting shaft 533 and the rear connecting ear 511, the sleeve body 5313 is provided with a fixed gear sleeve 535 fixedly connected to the rear connecting ear 511, a gap 5312 is provided between the rear end of the movable gear sleeve 536 and the limiting sleeve 539, the rear end of the fixed gear sleeve 535 is meshed with the front end of the movable gear sleeve 536, the movable gear sleeve 536 and the mounting sleeve 5310 are provided with a wire rod 532, the wire rod 532 and the movable gear sleeve 536 are slidably connected, the screwing portion of the adjustment handle 538 is located outside the side cover 66, the adjustment handle 53 8 and the limiting sleeve 539 are fixedly connected to the connecting shaft 533, the rear end of the adjusting handle 538 is provided with a fixing hole cover 5314, the wire-passing barrier 52 also includes a connecting seat 522 integrally formed with all the wire-passing barriers 521, the free end of the wire-passing barrier 521 is provided with a plug-in portion 523 inserted into the plug-in slot 622, and also includes a wire device 500 provided on the lower mounting plate 63 and located below the partition 64, the wire mechanism 500 includes a wire rod 501, a seat body 502 and a fixed elastic buckle 503, the rear end of the wire rod 501 is rotatably connected to the mounting seat body 502, and the front end of the wire rod 501 is detachable from the fixed elastic buckle 503 The side cover 66 is fixedly connected to the conductor rod 501. The side cover 66 is provided with an escape groove 67 for evading the conductor rod 501. The fixed elastic clip 503 includes a base 5031, a groove 5032, and two elastic clamping bodies 5033. The base 5031 is provided with a groove 5032 that matches the front end of the conductor rod 501. The base 5031 is provided with elastic clamping bodies 5033 on both sides of the groove 5032 to clamp the front end of the conductor rod 501. The elastic clamping bodies 5033 include a body 50331. The end of the body 50331 near the groove 5032 is formed with an inclined clamping portion 50332. The free end of the clamping portion 50332 is bent outward to form an inclined guide portion 50333.

[0037] Working process of the present invention:

[0038] During operation of the embroidery machine head of the present invention, the embroidery thread outputted by the thread clamp assembly passes through the right side of the thread barrier 521, the thread hook 53110, the left side of the thread barrier 521, the thread take-up rod, the left side of the thread barrier 521, the outer side of the thread rod 532, the inner side of the guide rod 501 and the lower thread-passing component in sequence, and finally reaches the embroidery needle.

[0039] When adjusting the tension, rotate the adjustment handle 538 clockwise or counterclockwise. The adjustment handle 538 drives the torsion spring sleeve 534, the mounting sleeve 5310 and the movable gear sleeve 536 to rotate through the connecting shaft 533. The mounting sleeve 5310 and the movable gear sleeve 536 drive the wire-passing rod 532 to move. The movable gear sleeve 536 and the fixed gear sleeve 535 jump one tooth or several teeth to cooperate. The torsion spring sleeve 534 drives the wire-passing torsion spring 531 to rotate clockwise or counterclockwise to achieve tension adjustment.

[0040] The synchronous pulley 416 is driven by the driving mechanism and drives the head main shaft 41 to rotate, the head main shaft 41 drives the main driving cam 49 and the presser foot cam 410 to rotate, the presser foot cam 410 drives the connecting rod I481 to swing back and forth, the connecting rod I481 drives the connecting rod II483 to swing through the rotating shaft I482, the connecting rod II483 drives the presser foot assembly driving seat 480 to move up and down through the connecting rod III484, and the presser foot assembly driving seat 480 drives the presser foot assembly to work; the main driving cam 49 drives the needle bar assembly driving seat 472 to move up and down through the connecting rod IV471, and the needle bar assembly driving seat 472 drives the needle bar assembly to work; the main driving cam 49 drives the connecting rod V461 to swing back and forth, the connecting rod V461 drives the swing arm 463 to swing through the rotating shaft II462, and the swing arm 463 drives the thread take-up rod assembly to work through the roller 464.

[0041] The color-changing motor 701 drives the color-changing cam 702 to rotate, and the color-changing cam 702 drives the needle bar frame 45 to move through the color-changing roller 703 to achieve color change.

[0042] When threading manually, first turn the wire rod 501 90 degrees. After threading is completed, turn the wire rod 501 again to fix the front end of the wire rod 501 in the groove 5032. At this time, the embroidery thread is naturally located on the inner side of the wire rod 501, which improves convenience.

[0043] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. An embroidery machine head, characterized in that: The machine head main shaft (41) comprises a plurality of bearing seats (42), a balancing block (43), a cantilever body (44), a needle bar frame (45) provided with a needle bar assembly, a presser foot assembly and a thread take-up rod assembly, a thread take-up rod transmission assembly (46), a needle bar transmission assembly (47) and a presser foot transmission assembly (48), wherein the machine head main shaft (41) is arranged on the cantilever body (44) through the bearing seat (42), the machine head main shaft (41) is provided with a balancing block (43), the front end of the cantilever body (44) is provided with a needle bar frame (45) through a slideway (417), the front end of the cantilever body (44) is provided with a color changing drive mechanism (70) for driving the needle bar frame (45), the machine head main shaft (41) drives the thread take-up rod transmission assembly (46), the needle bar transmission assembly (47) and the presser foot transmission assembly (48), 7) and a presser foot transmission assembly (48), wherein the needle bar frame (45) is provided with a middle thread passing device (50) and an isolation mechanism (60), wherein the isolation mechanism (60) comprises an upper mounting plate (61) located above the middle thread passing device (50) and a lower mounting plate (63) located below the middle thread passing device (50), wherein the upper mounting plate (61) is provided with an insert (62) which is detachably fixedly connected and isolates the upper and lower thread passing areas of the middle thread passing device (50) from the outside, and wherein the presser foot transmission assembly (48) comprises a presser foot assembly driving seat (480), a connecting rod I (481), a rotating shaft I (482), a connecting rod II (483) and a connecting rod III (484), wherein the rear end of the rotating shaft I (482) is connected to the presser foot assembly via the connecting rod I (481) The front end of the rotating shaft I (482) is connected to a roller in a cam groove of a presser foot cam (410); the front end of the rotating shaft I (482) is connected to one end of a connecting rod III (484) through a connecting rod II (483); the other end of the connecting rod III (484) is connected to a presser foot assembly driving seat (480); the presser foot assembly driving seat (480) is sleeved on two guide rods (411) fixedly arranged in the front end of the cantilever body (44); the needle bar transmission assembly (47) comprises a connecting rod IV (471) and a needle bar assembly driving seat (472); one end of the connecting rod IV (471) is eccentrically connected to the front end of the main driving cam (49); and the other end is connected to the needle bar assembly driving seat (472) slidably arranged on the two guide rods (411); The thread take-up lever transmission assembly (46) comprises a connecting rod V (461), a rotating shaft II (462), a swing arm (463) and a roller (464); one end of the rotating shaft II (462) is connected to a roller in a cam groove on the circumferential surface of a main driving cam (49) through the connecting rod V (461); the other end of the rotating shaft II (462) is provided with a swing arm (463); the swing arm (463) is provided with a roller (464) that matches with a connecting groove (418) of the thread take-up lever assembly; the presser foot assembly driving seat (480) comprises a transmission slider (4801), two sliding sleeves (4802), an input transmission rod (4803) and an output transmission body (4804); the transmission slider (4801) is provided with two guide holes.The guide holes are each provided with a sleeve (4802), the sleeves (4802) are each provided with a guide rod (411), the front end of the transmission slider (4801) is inserted with an input transmission rod (4803) fixedly connected to the transmission slider (4801) via a fixing screw (48010), the rear end of the transmission slider (4801) is provided with an output transmission body (4804), the front end of the input transmission rod (4803) is provided with a blind hole (4806), the blind hole (4806) is provided with an oil-conducting wool felt (4807), the peripheral surface of the input transmission rod (4803) is provided with a plurality of blind holes (4806) and the blind holes (4806) are provided with a plurality of oil-conducting wool felts (4807) and the blind holes (4806) are provided with a plurality of screws (4808) and the screws (4809) are provided with a plurality of screws (4810) and the screws (4811) are provided with a plurality of screws (4811) and the screws (4812) are provided with a plurality of screws (4813) and the screws (4814) are provided with a plurality of screws (4814) and the screws (4815) are provided with a plurality of screws (4816) and the screws (4817) are provided with a plurality of screws (4818) and the screws (4819) are provided with a plurality of screws (4811) and the screws (4811) are provided with a plurality of screws (4813) and the screws (4814) are provided with a plurality of screws (4815) and the screws (4816) are provided with a plurality of screws (4813) and the screws (4814) are provided with a plurality of screws (4813) and ) is connected to an oil outlet hole (4808) connected to the output transmission body (4804), a buffer block (4809) is provided on the output transmission body (4804), the central axes of the working ends of the input transmission rod (4803) and the buffer block (4809) are both located between the central axes of the two guide rods (411), the input transmission rod (4803) is provided with a groove (4805) for tightening the input transmission rod (4803) with a fixing screw (48010), the middle wire passing device (50) comprises a support body (51), a wire passing spacer (52) and a tension adjusting device (53), the support body (51) is provided with a wire passing spacer (52) and a tension adjusting device (53), A tension adjustment device (53) is provided below the wire-passing barrier (52), wherein the wire-passing barrier (52) comprises wire-passing barriers (521) arranged in sequence from front to back, the tension adjustment device (53) comprises wire-passing torsion springs (531) and wire-passing rods (532) corresponding one to one with the wire-passing barriers (521), a wire-passing hook (53110) being formed at the free end of the wire-passing torsion spring (531), the wire-passing rod (532) being located below the wire-passing hook (53110), the tension adjustment device (53) further comprising a connecting shaft (533), a plurality of torsion spring sleeves (534), a mounting sleeve (5310) and an adjustment mechanism, the connecting shaft (533) The connecting shaft (533) is rotatably arranged on the connecting ears (511) at both ends of the support body (51); a mounting sleeve (5310) and a torsion spring sleeve (534) located behind the mounting sleeve (5310) are fixedly sleeved on the connecting shaft (533) between the two connecting ears (511); a through-line torsion spring (531) is arranged in each of the torsion spring sleeves (534); one end of the through-line torsion spring (531) is fixedly connected to the torsion spring sleeve (534), and the other free end extends out of a slot (5311) on the torsion spring sleeve (534); and an adjusting mechanism fixedly connected to the rear connecting ear (511) is arranged at the rear end of the connecting shaft (533).

2. An embroidery machine head as claimed in claim 1, characterized in that: The color-changing drive mechanism (70) comprises a color-changing motor (701), a color-changing cam (702), a plurality of color-changing rollers (703) and a rotation sensor (704); the color-changing cam (702) is provided on the rotating shaft of the color-changing motor (701); the color-changing rollers (703) are arranged evenly at intervals and matched with the threaded cam grooves of the color-changing cam (702) on the needle bar frame (45); and the rotation sensor (704) is connected to the rotating shaft of the color-changing motor (701).

3. The embroidery machine head according to claim 1, characterized in that: The rear end of the machine head spindle (41) is provided with two bearing seats (42) and a synchronous pulley (416), an optical coupling sensing sheet (414) and an angle indicating ring (412) which are arranged in sequence from front to back between the two bearing seats (42). The machine head spindle (41) also includes an angle pointer (413) matched with the angle indicating ring (412) and an optical coupling sensor (415) matched with the optical coupling sensing sheet (414). The front end of the machine head spindle (41) is provided with a main driving cam (49), a bearing seat (42), a balancing block (43) and a presser foot cam (410) in sequence from front to back.

4. The embroidery machine head according to claim 1, characterized in that: The insert (62) comprises a block body (621) and an inserting slot body (622); a partition (64) corresponding to the inserting slot body (622) and inserted into the inserting slot body (622) is provided on the lower mounting plate (63); an elastic buckle (623) is provided at the upper end of the block body (621); a positioning hook (624) is provided at the lower front end of the block body (621); a positioning body (625) is provided at the upper front end of the block body (621); A thread passing groove (626) is provided on the right side of the blocking body (621); a slot I (611), a slot II (612) and a slot III (613) are provided on the upper mounting plate (61) respectively cooperating with the elastic buckle (623), the positioning body (625) and the positioning hook (624); a slot (65) corresponding to and cooperating with the thread take-up rod is provided on the upper mounting plate (61); and side covers (66) are provided at both ends of the upper mounting plate (61).

5. The embroidery machine head according to claim 1, characterized in that: The adjustment mechanism comprises a fixed gear sleeve (535), a movable gear sleeve (536), a spring (537), an adjustment handle (538) and a limiting sleeve (539); the rear end of the connecting shaft (533) is sleeved with the adjustment handle (538), the limiting sleeve (539), the spring (537) and the movable gear sleeve (536) in sequence from the back to the front; the front end of the movable gear sleeve (536) is provided with a sleeve body (5313) located between the connecting shaft (533) and the rear connecting ear (511); the sleeve body (5313) is sleeved with a fixed gear sleeve (535) fixedly connected to the rear connecting ear (511); a gap (5312) is provided between the rear end of the movable gear sleeve (536) and the limiting sleeve (539); the fixed gear sleeve (535) The rear end of the adjusting handle (538) is meshedly connected with the front end of the movable gear sleeve (536); the movable gear sleeve (536) and the mounting sleeve (5310) are provided with a wire rod (532); the wire rod (532) and the movable gear sleeve (536) are slidably connected; the screwing portion of the adjusting handle (538) is located outside the side cover (66); the adjusting handle (538) and the limiting sleeve (539) are fixedly connected to the connecting shaft (533); the rear end of the adjusting handle (538) is provided with a fixing hole cover (5314); the wire-passing baffle (52) further comprises a connecting seat (522) integrally formed with all the wire-passing baffles (521); and the free end of the wire-passing baffle (521) is provided with a plug-in portion (523) inserted into the plug-in slot (622).

6. An embroidery machine head according to any one of claims 1 to 5, characterized in that: The invention also comprises a wire guide mechanism (500) disposed on the lower mounting plate (63) and located below the partition plate (64), the wire guide mechanism (500) comprising a wire guide rod (501), a seat body (502) and a fixed elastic buckle (503), the rear end of the wire guide rod (501) being rotatably connected to the mounting seat body (502), the front end of the wire guide rod (501) being detachably connected to the fixed elastic buckle (503), the side cover (66) being provided with an avoidance groove (67) for avoiding the wire guide rod (501), the fixed elastic buckle (503) comprising a base (5031), a groove (5032) and a Two elastic card bodies (5033), the base (5031) is provided with a groove (5032) matching with the front end of the conductor rod (501), the base (5031) is provided with elastic card bodies (5033) for clamping the front end of the conductor rod (501) on both sides of the groove (5032), the elastic card body (5033) comprises a body (50331), an end of the body (50331) close to the groove (5032) is formed with an inclined clamping portion (50332), and the free end of the clamping portion (50332) is bent outward to form an inclined introduction portion (50333).

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