Odd-even independent machine head of embroidery machine

Abstract

The invention relates to an odd-even independent machine head of an embroidery machine, which comprises a plurality of groups of machine head seats, a thread take-up shaft, a driving main shaft, a presser foot shaft, a hook cutter shaft, a needle bar driving mechanism, a presser foot driving mechanism, a driving transmission mechanism and a hook cutter assembly, and the thread take-up shaft, the driving main shaft, the presser foot shaft and the hook cutter shaft are respectively pivoted on the machine head seats; the headstock is composed of an odd number of headstocks and an even number of headstocks which are distributed in a staggered mode, and the needle bar driving mechanism and the presser foot driving mechanism are connected to the driving main shaft in an inserted and sleeved mode and distributed on the two sides of the headstock. According to the embroidery machine head, the design of the presser foot driving mechanism is improved, meanwhile, the presser foot driving mechanism is driven by the driving main shaft, and the presser foot shaft is used for adjusting presser foot parameters, so that the load is greatly reduced, ultra-multi-head synchronous adjustment can be realized, and the problems of parameter adjustment and operation synchronism of the presser foot shaft of a small-head-distance ultra-multi-head machine are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of embroidery machine heads, and more specifically to an odd-even independent head of an embroidery machine. Background Art

[0002] With the progress of embroidery machine technology and the expansion of application fields, there are more and more types of needles, threads and fabrics used in embroidery. Different needle-thread-fabric matches have different requirements for embroidery machine technology. The movement law of the original pure mechanical structure is fixed, and the adaptability of the embroidery machine is limited. Then, a small head pitch super multi-head embroidery machine has been designed. For example, the fully independent control intelligent high-speed embroidery machine head designed by our company before has been patented, and the patent number is: CN202210558443.7; During the subsequent use of this series of high-speed embroidery machine heads, it is found that as the number of heads increases, the presser foot shaft will be torsionally stressed. The presser foot shaft uses a link mechanism to directly drive the presser foot to operate, resulting in the correct operation of the presser foot on the head close to the power source, but the presser foot on the head far from the power source does not conform to the designed operation trajectory, affecting the embroidery quality; In order to solve the torsional problem of the presser foot shaft when the load is large, a new head drive and presser foot adjustment structure needs to be designed. Summary of the Invention

[0003] The purpose of the present invention is to provide an odd-even independent head of an embroidery machine for the deficiencies of the existing technology. It designs and improves the presser foot drive mechanism, and at the same time changes it to be driven by a driving main shaft. At the same time, the presser foot shaft is responsible for adjusting the presser foot parameters, and the load is greatly reduced. It can achieve super multi-head synchronous adjustment, and solve the problems of presser foot shaft parameter adjustment and operation synchronization of small head pitch super multi-head machines.

[0004] An odd-even independent head of an embroidery machine includes multiple groups of head seats, thread take-up shafts, driving main shafts, presser foot shafts, hook shafts, needle bar drive mechanisms, presser foot drive mechanisms, drive transmission mechanisms and hook knife assemblies. The thread take-up shafts, driving main shafts, presser foot shafts and hook shafts are respectively pivotally connected to the head seats. The drive transmission mechanism includes a vertical guide post, the upper and lower ends of the guide post are respectively inserted and fixed on the head seats, and two sets of upper and lower distributed needle bar drive seats and presser foot drive seats are sleeved and connected on the guide post. The needle bar drive seats and presser foot drive seats both include connecting seats inserted on the guide post and in a "C" shape, and connecting shafts are inserted and fixed on the rear sides of the connecting seats; The head seats are composed of odd head seats and even head seats distributed in a staggered manner. The needle bar drive mechanism and the presser foot drive mechanism are respectively inserted and connected to the driving main shaft and distributed on both sides of the head seats; The needle bar drive mechanism includes a needle bar cam fixed to the drive spindle, a needle bar drive arm formed on the needle bar cam, a needle bar drive swing arm hinged to the lower end of the needle bar drive arm via a pin, a needle bar hinge shaft pivotally connected to the rear end of the needle bar drive swing arm, the needle bar hinge shaft being inserted and fixed to the machine head seat, a fork formed at the front end of the needle bar drive swing arm, needle bar connecting rod pins being inserted and fixed at both ends of the fork, needle bar connecting rods pivotally connected to the needle bar connecting rod pins at both ends of the fork, and the ends of the needle bar connecting rods being pivotally connected to the connecting shaft of the needle bar drive seat. The presser foot drive mechanism includes a presser foot cam fixed to the drive spindle via a sleeve. A presser foot drive arm is formed on the presser foot cam. A T-shaped presser foot drive swing arm is hinged to the lower end of the presser foot drive arm via a presser foot drive pin. A presser foot balance link is pivotally connected to the presser foot drive pin between the presser foot drive swing arm and the presser foot drive arm. A balance link pin is pivotally connected to the rear end of the presser foot balance link, and the balance link pin is inserted and fixed to the machine head base. A presser foot adjustment cam is provided below the presser foot balance link. An oblong adjustment hole is formed on one side wall of the presser foot adjustment cam, and an adjustment hole is formed on the other side wall of the presser foot adjustment cam. The machine has a recessed hole that is connected to the adjustment hole and is waist-shaped. The front and rear sides of the presser foot adjustment cam are respectively formed with a front hinge support and a rear hinge support. The rear hinge support is hinged to the machine head seat through the presser foot adjustment cam pin. The front hinge support is hinged to the presser foot adjustment link through the lower adjustment link pin. The upper end of the presser foot adjustment link is hinged to the middle of the presser foot drive swing arm through the upper adjustment link pin. The front end of the presser foot drive swing arm is pivotally connected to the presser foot link pin. The end of the presser foot link pin extends out of the presser foot drive swing arm and is pivotally connected to the presser foot link. The end of the presser foot link is pivotally connected to the connecting shaft of the presser foot drive seat. The presser foot shaft is fitted with a presser foot adjusting eccentric wheel, which is inserted into the adjusting hole of the presser foot adjusting cam and abuts against the inner wall of the adjusting hole. The presser foot shaft is inserted into the clearance hole of the presser foot adjusting cam.

[0005] Preferably, an eccentric counterweight ring opposite to the inner hole of the needle bar cam is fixedly connected to the side end face of the needle bar cam, and the eccentric counterweight ring is sleeved and fixed on the drive spindle. The lower end of the needle bar drive arm is formed with a hinge sleeve. A pin is inserted into the hinge sleeve of the needle bar drive arm. One end of the pin is inserted and fixed in the middle of the needle bar drive swing arm, and the other end extends out of the hinge sleeve of the needle bar drive arm and is screwed and fixed with a limit nut.

[0006] Preferably, the two ends of the fork head of the needle bar drive swing arm are respectively formed with annular clamping sleeves. The inner wall of the clamping sleeve is formed with a groove that penetrates the outer wall of the clamping sleeve. A fastening screw is inserted into the clamping sleeve on the front side of the groove. The rear end of the fastening screw is screwed and fixed to the clamping sleeve on the rear side of the groove. The needle bar connecting rod pin is clamped and fixed in the clamping sleeve of the needle bar drive swing arm.

[0007] Preferably, the lower end of the presser foot drive arm is formed with a hinge sleeve, and the presser foot drive pin passes through the rear end of the presser foot drive swing arm, the front end of the presser foot balance link and the hinge sleeve of the presser foot drive arm in sequence and is screwed with a limit nut; the front and rear ends of the presser foot balance link and the rear end of the presser foot drive swing arm are all inserted and fixed with bearings. The front hinge lug of the presser foot adjusting cam has a threaded hole, and the end of the lower adjusting rod pin is screwed and fixed in the threaded hole of the presser foot adjusting cam. The rear hinge lug has a pin hole, and the presser foot adjusting cam pin is inserted into the pin hole of the rear hinge lug.

[0008] Preferably, one end of the presser foot adjusting eccentric wheel has a presser foot adjusting cam with a tensioning groove that penetrates the inner and outer walls of the presser foot adjusting eccentric wheel. A locking clamp is fixed to the presser foot adjusting eccentric wheel insert at the tensioning groove. The locking clamp presses the tensioning groove on the presser foot adjusting eccentric wheel to close, and the presser foot adjusting eccentric wheel is clamped and fixed on the presser foot shaft.

[0009] Preferably, the machine head base has a hinge hole formed opposite to the pressure foot adjusting eccentric wheel, and a ball bearing is fixed on the pressure foot adjusting eccentric wheel. The pressure foot adjusting eccentric wheel is connected to the hinge hole of the machine head base through the ball bearing.

[0010] Preferably, a drive slider is inserted into the connecting seat on the drive transmission mechanism, and the drive slider is sleeved on the guide post; a pressing protrusion is formed on the outer wall of the front side of the drive slider. An electromagnet is fixed to the headstock on one side of the drive slider. A rotating drive protrusion is formed on the drive slider that is close to the electromagnet. When the electromagnet is energized, it generates a magnetic force to hold the rotating drive protrusion. The rotating drive protrusion drives the drive slider to rotate around the guide post. A torsion spring is fitted on the guide post, with one end of the torsion spring inserted and fixed to the drive slider and the other end inserted and fixed to the connecting seat.

[0011] The beneficial effects of this invention are as follows: This embroidery machine head features an improved design for the presser foot drive mechanism, replacing it with a drive spindle. The presser foot shaft is now used for presser foot parameter adjustment, significantly reducing the load and enabling synchronous adjustment of multiple heads. This solves the problem of presser foot shaft parameter adjustment and operational synchronization in machines with small head spacing and numerous heads. Attached Figure Description

[0012] Figure 1 A three-dimensional structural diagram of the invention; Figure 2 This is an exploded view of the various components of the present invention; Figure 3 This is a three-dimensional structural diagram of the internal machine head unit of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the internal needle rod driving mechanism of the present invention; Figure 5 Schematic three-dimensional structure diagram of the inner presser foot driving mechanism of the present invention; Figure 6 Explosion schematic diagram of a part of the inner presser foot driving mechanism of the present invention; Figure 7 Schematic structure diagram of the upper presser foot adjusting cam of the inner presser foot driving mechanism of the present invention; Figure 8 Schematic structure diagram of the upper presser foot adjusting eccentric wheel of the inner presser foot driving mechanism of the present invention; Figure 9 Schematic diagram of the state when the inner presser foot adjusting eccentric wheel is downward of the present invention; Figure 10 Schematic diagram of the state when the inner presser foot adjusting eccentric wheel is upward of the present invention.

[0013] In the figure: 1. Headstock; 2. Thread take-up shaft; 3. Driving main shaft; 4. Presser foot shaft; 5. Looper shaft; 6. Needle bar driving mechanism; 7. Presser foot driving mechanism; 8. Driving transmission mechanism; 9. Electromagnet; 10. Looper assembly. Specific embodiments

[0014] Embodiment: As shown in Figures 1 to 8 An odd-even independent headstock of an embroidery machine, comprising multiple groups of headstocks 1, thread take-up shafts 2, driving main shafts 3, presser foot shafts 4, looper shafts 5, needle bar driving mechanisms 6, presser foot driving mechanisms 7, driving transmission mechanisms 8 and looper assemblies 10. The thread take-up shafts 2, driving main shafts 3, presser foot shafts 4 and looper shafts 5 are respectively pivotally connected to the headstock 1. The driving transmission mechanism 8 includes a vertical guide post 81, the upper and lower ends of the guide post 81 are respectively inserted and fixed on the headstock 1, and two sets of upper and lower distributed needle bar driving seats and presser foot driving seats are sleeved and connected on the guide post 81. The needle bar driving seats and presser foot driving seats both include connecting seats 82 sleeved on the guide post 81 and in a "C" shape, and a connecting shaft 83 is inserted and fixed at the rear side of the connecting seat 82; the headstock 1 is composed of odd-numbered headstocks and even-numbered headstocks distributed in a staggered manner, and the needle bar driving mechanism 6 and the presser foot driving mechanism 7 are respectively inserted and sleeved on the driving main shaft 3 and distributed on both sides of the headstock 1; The needle bar driving mechanism 6 includes a needle bar cam 61 inserted and fixed on the driving main shaft 3. A needle bar driving arm 611 is formed on the needle bar cam 61. The lower end of the needle bar driving arm 611 is hinged with a needle bar driving swing arm 62 through a pin shaft. The rear end of the needle bar driving swing arm 62 is pivotally connected to a needle bar hinge shaft 63, and the needle bar hinge shaft 63 is inserted and fixed on the headstock 1. A fork head 621 is formed at the front end of the needle bar driving swing arm 62. Needle bar connecting pins 64 are respectively inserted and fixed at both ends of the fork head 621. A needle bar connecting rod 65 is pivotally connected to the needle bar connecting pins 64 at both ends of the fork head 621, and the ends of the needle bar connecting rod 65 are respectively pivotally connected to the connecting shafts 83 of the needle bar driving seats; The presser foot drive mechanism 7 includes a presser foot cam 71 fixed to the drive spindle 3. A presser foot drive arm 711 is formed on the presser foot cam 71. A T-shaped presser foot drive swing arm 73 is hinged to the lower end of the presser foot drive arm 711 via a presser foot drive pin 75. A presser foot balance link 74 is pivotally connected to the presser foot drive pin 75 between the presser foot drive swing arm 73 and the presser foot drive arm 711. A balance link pin 750 is pivotally connected to the rear end of the presser foot balance link 74. The balance link pin 750 is inserted and fixed to the machine head base 1. A presser foot adjustment cam 72 is provided below the presser foot balance link 74. An oblong adjustment hole 723 is formed on one side wall of the presser foot adjustment cam 72, and an oblong adjustment hole 723 is formed on the other side wall of the presser foot adjustment cam 72. A clearance insertion hole 726, which is connected to the adjustment hole 723 and is waist-shaped, is provided. The front and rear sides of the presser foot adjustment cam 72 are respectively formed with a front hinge support 722 and a rear hinge support 721. The rear hinge support 721 is hinged to the machine head seat 1 through the presser foot adjustment cam pin 740. The front hinge support 722 is hinged to the presser foot adjustment link 76 through the lower adjustment link pin 77. The upper end of the presser foot adjustment link 76 is hinged to the middle of the presser foot drive swing arm 73 through the upper adjustment link pin 78. The front end of the presser foot drive swing arm 73 is pivotally connected to the presser foot link pin 720. The end of the presser foot link pin 720 extends out of the presser foot drive swing arm 73 and is pivotally connected to the presser foot link 730. The end of the presser foot link 730 is pivotally connected to the connecting shaft 83 of the presser foot drive seat. The presser foot shaft 4 is fitted with a presser foot adjusting eccentric wheel 79, which is inserted into the adjusting hole 723 of the presser foot adjusting cam 72 and abuts against the inner wall of the adjusting hole 723. The presser foot shaft 4 is inserted into the clearance hole 726 of the presser foot adjusting cam 72.

[0015] An eccentric counterweight ring 65, which is opposite to the inner hole of the needle bar cam 61, is fixedly attached to the side end face of the needle bar cam 61. The eccentric counterweight ring 65 is inserted and fixed on the drive spindle 3. The eccentric counterweight ring 65 can increase the weight of the needle bar cam 61. Both the needle bar cam 61 and the presser foot cam 71 are made of iron cams. They are staggered and distributed on both sides of the headstock 1, forming a symmetrical and balanced distribution, which improves the stability of the embroidery machine and realizes the ultra-high speed operation of the small-head-distance embroidery machine.

[0016] The lower end of the needle bar drive arm 611 is formed with a hinge sleeve. A pin is inserted into the hinge sleeve of the needle bar drive arm 611. One end of the pin is inserted and fixed in the middle of the needle bar drive swing arm 62, and the other end extends out of the hinge sleeve of the needle bar drive arm 611 and is screwed and fixed with a limit nut.

[0017] The two ends of the fork head 621 of the needle bar drive swing arm 62 are respectively formed with annular clamping sleeves 622. The inner wall of the clamping sleeve 622 is formed with a groove that penetrates the outer wall of the clamping sleeve 622. A fastening screw is inserted into the clamping sleeve 622 on the front side of the groove. The rear end of the fastening screw is screwed and fixed to the clamping sleeve 622 on the rear side of the groove. The needle bar connecting rod pin 64 is clamped and fixed in the clamping sleeve 622 of the needle bar drive swing arm 62.

[0018] The lower end of the presser foot drive arm 711 is formed with a hinge sleeve. The presser foot drive pin 75 passes through the rear end of the presser foot drive swing arm 73, the front end of the presser foot balance link 74, and the hinge sleeve of the presser foot drive arm 711 in sequence and is screwed with a limit nut. The front and rear ends of the presser foot balance link 74 and the rear end of the presser foot drive swing arm 73 are all inserted and fixed with bearings. The bearings can reduce friction and wear.

[0019] The front hinge lug 722 of the presser foot adjusting cam 72 has a threaded hole 724 formed therein, and the end of the lower adjusting rod pin 77 is screwed and fixed in the threaded hole 724 of the presser foot adjusting cam 72. The rear hinge lug 722 has a pin hole 725 formed therein, and the presser foot adjusting cam pin 740 is inserted into the pin hole 725 of the rear hinge lug 722.

[0020] One end of the presser foot adjusting eccentric wheel 79 has a presser foot adjusting cam 72 with a tensioning groove 791 that runs through the inner and outer walls of the presser foot adjusting eccentric wheel 79. A locking clamp 710 is inserted and fixed to the presser foot adjusting eccentric wheel 79 at the tensioning groove 791. The locking clamp 710 presses the tensioning groove 791 on the presser foot adjusting eccentric wheel 79 to close it, and the presser foot adjusting eccentric wheel 79 is clamped and fixed on the presser foot shaft 4.

[0021] The machine head base 1 has a hinge hole formed on it, which is opposite to the pressure foot adjusting eccentric wheel 79. A ball bearing 760 is inserted and fixed on the pressure foot adjusting eccentric wheel 79. The pressure foot adjusting eccentric wheel 79 is connected to the hinge hole of the machine head base 1 through the ball bearing 760. The pressure foot adjusting eccentric wheel 79 is hinged to the machine head base 1 by the bearing. Thus, the pressure foot shaft 4 can be hinged to the machine head base 1 based on the pressure foot adjusting eccentric wheel 79.

[0022] A drive slider 84 is inserted into the connecting seat 82 on the drive transmission mechanism 8. The drive slider 84 is sleeved on the guide post 81. A pressing protrusion 841 is formed on the outer wall of the front side of the drive slider 84. A needle frame is set on the front side of the headstock 1. A vertical needle bar and a presser foot are set on the needle frame. A pressing sleeve opposite to the pressing protrusion 841 is sleeved and fixed on both the presser foot and the needle bar. The pressing protrusion 841 can press on the pressing sleeve of the presser foot and the needle bar to drive the presser foot and the needle bar to move downward. An electromagnet 9 is fixed to the headstock 1 on one side of the drive slider 84. A rotating drive protrusion is formed on the drive slider 84, close to the electromagnet 9. When the electromagnet 9 is energized, it generates a magnetic force to hold the rotating drive protrusion. The rotating drive protrusion drives the drive slider 84 to rotate around the guide post 81. After the drive slider 84 rotates, it can move the pressing protrusion 841 away from the top of the pressing protrusion 841. When the pressing protrusion 841 is moved away, it is no longer possible to drive the presser foot or needle bar. The above structure is the existing structure on the existing embroidery machine.

[0023] A torsion spring 85 is fitted on the guide post 81. One end of the torsion spring 85 is inserted and fixed on the drive slider 84, and the other end is inserted and fixed on the connecting seat 82.

[0024] Working principle: This structure is an odd and even independent machine head for an embroidery machine. It is a multi-head embroidery machine. Only two heads are shown in the attached drawings of this application. In a multi-head embroidery machine, the machine head bases can be divided into odd-numbered machine head bases and even-numbered machine head bases according to the position of the number of heads. The core content of this application is to modify the needle bar drive mechanism 6 and redesign the presser foot drive mechanism 7. Both are installed on the drive spindle 3 of the original single-drive needle bar drive mechanism 6, and the drive spindle 3 simultaneously drives the needle bar drive mechanism 6 and the presser foot drive mechanism 7 (both the needle bar drive mechanism 6 and the presser foot drive mechanism 7 are linkage mechanisms, the purpose of which is to drive the needle bar drive seat and the presser foot drive seat to move on the guide post 81 respectively through the linkage mechanism). Simultaneously, the presser foot drive mechanism 7, driven by the drive spindle 3, uses the presser foot adjusting eccentric wheel 79 of the presser foot shaft 4 to adjust the position of the presser foot; such as Figure 9 As shown, the presser foot adjusting eccentric wheel 79 is located at the lower part of the presser foot adjusting cam 72. That is, when the presser foot adjusting eccentric wheel 79 is downward, the presser foot adjusting linkage 76 is lowered, controlling the presser foot drive seat to reach the lowest position (the lower stroke position of the presser foot drive seat during the movement of the guide column 81) to adjust the presser height. When the pressure foot adjusting eccentric wheel 79 is located above the pressure foot adjusting cam 72, that is, when the pressure foot adjusting eccentric wheel 79 is facing upwards, as... Figure 10 As shown, when the presser foot adjusting linkage 76 is raised, the presser foot drive seat moves upward to hang the presser foot. When the presser foot adjusting eccentric wheel 79 is adjusted to its lowest position, the presser foot adjusting eccentric wheel 79 is locked under the control of the presser foot shaft 4 and is not affected by external forces from other components on its presser foot drive mechanism 7. It is not easily deflected, which greatly improves the stability of the presser foot adjusting shaft, realizes presser foot height adjustment, and self-locking of the running position. Even with a large number of heads, the shaft torsion will not be affected, thus solving the problem of presser foot stability in ultra-high speed operation with a small head distance. The embodiments described are illustrative of the invention and are not intended to limit the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. An odd-even independent head of an embroidery machine, comprising multiple groups of head seats (1), thread take-up shafts (2), driving main shafts (3), presser foot shafts (4), hook shafts (5), needle bar driving mechanisms (6), presser foot driving mechanisms (7), driving transmission mechanisms (8) and hook assemblies (10). The thread take-up shafts (2), driving main shafts (3), presser foot shafts (4) and hook shafts (5) are respectively pivotally connected to the head seats (1). The driving transmission mechanism (8) includes a vertical guide post (81), the upper and lower ends of the guide post (81) are respectively inserted and fixed on the head seat (1), and two sets of needle bar driving seats and presser foot driving seats which are distributed up and down are sleeved and connected on the guide post (81). The needle bar driving seats and the presser foot driving seats both include connecting seats (82) which are inserted on the guide post (81) and are in a "C" shape, and a connecting shaft (83) is inserted and fixed on the rear side of the connecting seat (82); the head seat (1) is composed of odd head seats and even head seats which are staggeredly distributed, and is characterized in that: The needle bar drive mechanism (6) and the presser foot drive mechanism (7) are respectively inserted and connected to the drive spindle (3) and distributed on both sides of the headstock (1); The needle bar drive mechanism (6) includes a needle bar cam (61) fixed on the drive spindle (3), a needle bar drive arm (611) formed on the needle bar cam (61), a needle bar drive swing arm (62) hinged to the lower end of the needle bar drive arm (611) by a pin, a needle bar hinge shaft (63) pivotally connected to the rear end of the needle bar drive swing arm (62), the needle bar hinge shaft (63) is inserted and fixed on the machine head seat (1), a fork head (621) is formed at the front end of the needle bar drive swing arm (62), a needle bar connecting rod pin (64) is inserted and fixed at both ends of the fork head (621), a needle bar connecting rod (65) is pivotally connected to the needle bar connecting rod pin (64) at both ends of the fork head (621), and the ends of the needle bar connecting rod (65) are pivotally connected to the connecting shaft (83) of the needle bar drive seat. The presser foot drive mechanism (7) includes a presser foot cam (71) fixed to the drive spindle (3) with a sleeve. A presser foot drive arm (711) is formed on the presser foot cam (71). The lower end of the presser foot drive arm (711) is hinged to a T-shaped presser foot drive swing arm (73) through a presser foot drive pin (75). A presser foot balance link (74) is pivotally connected to the presser foot drive pin (75) between the presser foot drive swing arm (73) and the presser foot drive arm (711). A balance link pin (750) is pivotally connected to the rear end of the presser foot balance link (74). The balance link pin (750) is inserted and fixed on the machine head base (1). A presser foot adjustment cam (72) is provided below the presser foot balance link (74). An oblong adjustment hole (723) is formed on one side wall of the presser foot adjustment cam (72), and an oblong adjustment hole (723) is formed on the other side wall of the presser foot adjustment cam (72). A clearance insertion hole (726) connected to the adjustment hole (723) and in the shape of a waist-shaped hole is provided. The front and rear sides of the presser foot adjustment cam (72) are respectively formed with a front hinge support (722) and a rear hinge support (721). The rear hinge support (721) is hinged to the machine head base (1) by the presser foot adjustment cam pin (740). The front hinge support (722) is hinged to the presser foot adjustment rod by the lower adjustment link pin (77). 76), the upper end of the presser foot adjusting linkage (76) is hinged to the middle of the presser foot drive swing arm (73) through the upper adjusting linkage pin (78); the front end of the presser foot drive swing arm (73) is pivotally connected to the presser foot linkage pin (720), the end of the presser foot linkage pin (720) extends out of the presser foot drive swing arm (73) and is pivotally connected to the presser foot linkage (730), the end of the presser foot linkage (730) is pivotally connected to the connecting shaft (83) of the presser foot drive seat; The presser foot shaft (4) is fitted with a presser foot adjusting eccentric wheel (79). The presser foot adjusting eccentric wheel (79) is inserted into the adjusting hole (723) of the presser foot adjusting cam (72) and abuts against the inner wall of the adjusting hole (723). The presser foot shaft (4) is inserted into the clearance hole (726) of the presser foot adjusting cam (72).

2. The odd-even independent machine head of an embroidery machine according to claim 1, characterized in that: An eccentric counterweight ring (65) opposite to the inner hole of the needle bar cam (61) is fixed on the side end face of the needle bar cam (61), and the eccentric counterweight ring (65) is inserted and fixed on the drive spindle (3). The lower end of the needle bar drive arm (611) is formed with a hinge sleeve. A pin is inserted into the hinge sleeve of the needle bar drive arm (611). One end of the pin is inserted and fixed in the middle of the needle bar drive swing arm (62), and the other end extends out of the hinge sleeve of the needle bar drive arm (611) and is screwed and fixed with a limit nut.

3. The odd-even independent machine head of an embroidery machine according to claim 2, characterized in that: The two ends of the fork head (621) of the needle bar drive swing arm (62) are respectively formed with annular clamping sleeves (622). The inner wall of the clamping sleeve (622) is formed with a groove that penetrates the outer wall of the clamping sleeve (622). A fastening screw is inserted into the clamping sleeve (622) on the front side of the groove. The rear end of the fastening screw is screwed and fixed on the clamping sleeve (622) on the rear side of the groove. The needle bar connecting rod pin (64) is clamped and fixed in the clamping sleeve (622) of the needle bar drive swing arm (62).

4. The odd-even independent machine head of an embroidery machine according to claim 1, characterized in that: The lower end of the presser foot drive arm (711) is formed with a hinge sleeve. The presser foot drive pin (75) passes through the rear end of the presser foot drive swing arm (73), the front end of the presser foot balance link (74), and the hinge sleeve of the presser foot drive arm (711) in sequence and is screwed with a limit nut. The front and rear ends of the presser foot balance link (74) and the rear end of the presser foot drive swing arm (73) are all fixed with bearings. The front hinge lug (722) of the presser foot adjusting cam (72) has a threaded hole (724) formed on it. The end of the lower adjusting rod pin (77) is screwed and fixed in the threaded hole (724) of the presser foot adjusting cam (72). The rear hinge lug (722) has a pin hole (725) formed on it. The presser foot adjusting cam pin (740) is inserted into the pin hole (725) of the rear hinge lug (722).

5. The odd-even independent machine head of an embroidery machine according to claim 4, characterized in that: One end of the foot-adjusting eccentric wheel (79) has a foot-adjusting cam (72) formed with a tensioning groove (791) that runs through the inner and outer walls of the foot-adjusting eccentric wheel (79). The foot-adjusting eccentric wheel (79) is fitted with a locking clamp (710) at the tensioning groove (791). The locking clamp (710) presses the tensioning groove (791) on the foot-adjusting eccentric wheel (79) to close, and the foot-adjusting eccentric wheel (79) is clamped and fixed on the foot shaft (4).

6. The odd-even independent machine head of an embroidery machine according to claim 5, characterized in that: The machine head base (1) is formed with a hinge hole opposite to the presser foot adjusting eccentric wheel (79). A ball bearing (760) is fixed on the presser foot adjusting eccentric wheel (79). The presser foot adjusting eccentric wheel (79) is connected to the hinge hole of the machine head base (1) through the ball bearing (760).

7. The odd-even independent machine head of an embroidery machine according to claim 1, characterized in that: A drive slider (84) is inserted into the connecting seat (82) on the drive transmission mechanism (8), and the drive slider (84) is sleeved on the guide post (81); a pressing protrusion (841) is formed on the outer wall of the front side of the drive slider (84). An electromagnet (9) is fixed on the headstock (1) on one side of the drive slider (84). A rotating drive protrusion close to the electromagnet (9) is formed on the drive slider (84). When the electromagnet (9) is energized, it generates magnetic force to hold the rotating drive protrusion. The rotating drive protrusion drives the drive slider (84) to rotate around the guide post (81). A torsion spring (85) is fitted on the guide post (81). One end of the torsion spring (85) is inserted and fixed on the drive slider (84), and the other end is inserted and fixed on the connecting seat (82).

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