Active thread feeding equipment applied to multi-head embroidery machine

Abstract

The utility model discloses active thread feeding equipment applied to a multi-machine-head embroidery machine, and aims to provide the active thread feeding equipment applied to the multi-machine-head embroidery machine, which adopts an active thread feeding mode, actively provides embroidery threads for each needle in an embroidery process so as to improve the quality of embroideries and meets the use requirements of the current multi-station embroidery machine. The thread feeding shaft extends along the arrangement direction of each machine head of the embroidery machine; the wire feeding driving unit drives the wire feeding shaft to rotate; the wire pressing units are sequentially distributed in the axial direction of the wire feeding shaft and comprise a plurality of swing arms and swing arm mechanisms, the swing arms are rotationally arranged through shaft rods, the swing arms are sequentially distributed in the axial direction of the wire feeding shaft, wire pressing wheels are arranged on the swing arms, and the swing arm mechanisms drive the swing arms to rotate so that the wire pressing wheels can be tightly pressed on the surface of the wire feeding shaft. Each wire pressing wheel of each wire pressing unit is matched with the same wire feeding shaft; an embroidery thread of the embroidery machine firstly passes through the space between the thread feeding shaft and the thread pressing wheel and then penetrates through the corresponding embroidery needle.

Description

Technical Field

[0001] The utility model relates to the field of embroidery machines, in particular to an active thread feeding device applied to a multi-head embroidery machine. Background Art

[0002] With the development of embroidery machines, the number of heads on embroidery machines has been increasing. Currently, there are dozens or even hundreds of heads in multi-station embroidery machines, and each head is arranged in a row. Each head includes a needle bar rack, on which a row of embroidery needles are arranged. The embroidery thread passing through the embroidery needles in the embroidery machine needs to maintain a suitable tightness, not too tight or too loose; if the embroidery thread is too tight, the fabric will be pulled loose by the embroidery thread during the embroidery process, and even holes will appear under the pulling of the embroidery thread, affecting the quality of the embroidery; if the embroidery thread is too loose, the embroidery thread of the embroidery pattern will be loose, seriously reducing the quality of the embroidery.

[0003] In order to solve the above problems, the current embroidery machine uses a thread presser on the needle bar frame. Each embroidery needle corresponds to a thread presser. Each thread presser includes several thread presser knobs. The embroidery thread corresponding to the embroidery needle first passes through the thread presser knobs of the corresponding thread presser, and then passes through the corresponding embroidery needle. The thread presser knob is manually rotated to adjust the pressing force of the thread presser on the embroidery thread, thereby adjusting the tightness of the embroidery thread. The current embroidery machine uses a thread presser to manually adjust the tightness of the embroidery thread. Although it can solve the problem of the tightness of the embroidery thread to a certain extent, it has the following shortcomings:

[0004] The tightness of the embroidery thread depends on manual adjustment by the operator, but manual adjustment has the problems of low adjustment efficiency, poor consistency of adjustment of the tightness of the embroidery thread, and the quality of the embroidery cannot be guaranteed; there is also the problem of high labor costs.

[0005] On the other hand, the use of a thread crimper to manually adjust the tightness of the embroidery thread is suitable for use in situations where there are fewer heads (3-6 heads) in traditional embroidery machines. Traditional embroidery machines have fewer heads and fewer thread crimpers. Operators can also manually adjust the tightness of the embroidery thread to adapt to the production rhythm; however, with the development of embroidery machines, there are dozens or even hundreds of heads in multi-station embroidery machines, and hundreds or even thousands of embroidery needles (the number of thread crimpers is the same as that of embroidery needles). In this case, manually adjusting the tightness of the embroidery thread cannot adapt to the production rhythm at all. Therefore, the current method of manually adjusting the tightness of the embroidery thread using a thread crimper is increasingly unable to meet the current use needs of multi-station embroidery machines. Utility Model Content

[0006] The first purpose of the utility model is to provide an active thread feeding device applied to a multi-head embroidery machine, which adopts an active thread feeding method to actively provide embroidery thread for each needle in the embroidery process to improve the quality of embroidery products and adapt to the use requirements of current multi-station embroidery machines.

[0007] Another purpose of the utility model is to provide an active thread feeding device applied to a multi-head embroidery machine which can reduce the manufacturing cost.

[0008] The technical solution of the utility model is:

[0009] An active thread feeding device applied to a multi-head embroidery machine, the embroidery machine comprises a frame and a needle bar frame, including:

[0010] A thread feed shaft extends along the arrangement direction of each head of the embroidery machine;

[0011] A wire feeding drive unit drives the wire feeding shaft to rotate;

[0012] A plurality of wire pressing units are sequentially distributed along the axial direction of the wire feeding shaft, comprising a plurality of swing arms and a swing arm mechanism which are arranged by rotating the shaft, each swing arm is sequentially distributed along the axial direction of the wire feeding shaft, a wire pressing wheel is arranged on the swing arm, and the swing arm mechanism drives the swing arm to rotate so that the wire pressing wheel is pressed tightly on the surface of the wire feeding shaft, and each wire pressing wheel of each wire pressing unit cooperates with the same wire feeding shaft;

[0013] The embroidery thread of the embroidery machine first passes between the thread feeding shaft and the thread pressing wheel, and then passes through the corresponding embroidery needle. The specific operation of the active thread feeding device of the present solution applied to a multi-head embroidery machine is as follows, taking the working process of a certain embroidery needle of the head of the embroidery machine as an example to describe,

[0014] When the embroidery needle is in the working position, the swing arm mechanism drives a corresponding swing arm to rotate so that the corresponding thread pressing wheel is pressed against the surface of the thread feeding shaft, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feeding shaft and the thread pressing wheel; then, the thread feeding shaft is driven to rotate by the thread feeding drive unit to actively output the embroidery thread, and the length of the embroidery thread output each time is controlled by the rotation angle of the thread feeding shaft, and the length of the embroidery thread output each time is consistent with a corresponding stitch length in the embroidery process; in this way, the active thread feeding method is adopted to actively provide embroidery thread with a length consistent with the stitch length for each needle in the embroidery process, so that the embroidery thread will not pull the fabric, and ensure that the embroidery thread of the embroidery pattern is dense and not loose, thereby improving the quality of the embroidery, and effectively solving the problems of low manual adjustment efficiency, poor consistency of embroidery thread tightness adjustment, and inability to ensure embroidery quality in the prior art embroidery machine using a thread presser to manually adjust the tightness of the embroidery thread. The thread feeding system of this solution adopts an active thread feeding method to actively provide embroidery thread for each stitch in the embroidery process, so there is no need to manually adjust the tightness of the embroidery thread. It can well adapt to the use requirements of current multi-station embroidery machines and the production rhythm of current multi-station embroidery machines.

[0015] On the other hand, each crimping wheel of each crimping unit cooperates with the same wire feeding shaft, so that only one wire feeding drive unit is needed to drive the wire feeding shaft to rotate, so that the embroidery needles of each machine head can be synchronously and actively fed with wire, which can effectively reduce the number of wire feeding drive units, thereby reducing the production cost. In addition, each crimping wheel of each crimping unit cooperates with the same wire feeding shaft, so only one wire feeding shaft needs to be installed during installation, which can simplify the installation steps.

[0016] Preferably, the thread feed shaft is rotatably arranged on the frame, the swing arm is rotatably arranged on the frame through the shaft, the same thread pressing unit has one swing arm mechanism, and the swing arm mechanism moves synchronously with the needle bar frame, so that the swing arm mechanism corresponds to each swing arm of the same thread pressing unit in turn; the swing arm mechanism drives a corresponding swing arm to rotate, so that the corresponding thread pressing wheel is pressed on the surface of the thread feed shaft. Based on this, when the needle bar frame is translated to make the embroidery needle in the working position, the swing arm mechanism moves synchronously with the needle bar frame, and the swing arm mechanism is translated to the swing arm corresponding to the embroidery needle; then, the swing arm mechanism drives a corresponding swing arm to rotate, so that the corresponding thread pressing wheel is pressed on the surface of the thread feed shaft, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feed shaft and the thread pressing wheel; then, the thread feed shaft is driven to rotate by the thread feed drive unit, and the embroidery thread is actively output. In this way, only one swing arm mechanism is needed for the same thread pressing unit, and there is no need for each swing arm to correspond to a swing arm mechanism, which can effectively reduce the number of swing arm mechanisms, thereby further reducing the production cost.

[0017] Preferably, the swing arm mechanism is fixed on the needle bar frame. In this way, the swing arm mechanism can move synchronously with the needle bar frame, and no additional power mechanism is required to drive the swing arm mechanism to move synchronously with the needle bar frame, which can further reduce the production cost and facilitate actual production.

[0018] Preferably, the first translation device is also included, which includes:

[0019] A first guide rail is arranged on the frame and is parallel to the wire feeding shaft;

[0020] A first slide seat sliding along the first guide rail, wherein the swing arm mechanism of each wire pressing unit is arranged on the first slide seat;

[0021] The first translation actuator drives the first slide to move synchronously with the needle bar frame, so that the swing arm mechanism moves synchronously with the needle bar frame. In this way, the positions of the first guide rail and the first slide can be arranged according to actual needs, and then the first slide is driven to move synchronously with the needle bar frame by the first translation actuator, so that the swing arm mechanism moves synchronously with the needle bar frame.

[0022] Preferably, the swing arm mechanism is fixedly arranged on the frame, and the same wire pressing unit has one swing arm mechanism, and the wire feeding shaft and the swing arm move synchronously with the needle bar frame, so that the swing arm mechanism corresponds to each swing arm of the same wire pressing unit in turn; the swing arm mechanism drives a corresponding swing arm to rotate, so that the corresponding wire pressing wheel is pressed on the surface of the wire feeding shaft. Based on this, when the needle bar frame translates and makes the embroidery needle in the working position, the wire feeding shaft and the swing arm move synchronously with the needle bar frame, so that the swing arm corresponding to the embroidery needle moves to the swing arm mechanism; then, the swing arm mechanism drives a corresponding swing arm to rotate, so that the corresponding wire pressing wheel is pressed on the surface of the wire feeding shaft, thereby pressing the embroidery thread corresponding to the embroidery needle between the wire feeding shaft and the wire pressing wheel; then, the wire feeding shaft is driven to rotate by the wire feeding drive unit, and the embroidery thread is actively output. In this way, only one swing arm mechanism is needed for the same wire pressing unit, and there is no need for each swing arm to correspond to a swing arm mechanism, which can effectively reduce the number of swing arm mechanisms, thereby further reducing the production cost.

[0023] Preferably, the machine further comprises a second translation mechanism disposed on the frame, comprising:

[0024] A second guide rail is arranged on the frame and is parallel to the wire feeding shaft;

[0025] A second slide seat slides along the second guide rail, the wire feeding shaft is arranged on the second slide seat, and the swing arm is arranged on the second slide seat by rotating the shaft rod;

[0026] The second translation actuator drives the second slide to move synchronously with the needle bar frame, so that the thread feed shaft and the swing arm move synchronously with the needle bar frame. In this way, the positions of the second guide rail and the second slide can be arranged according to actual needs, and then the second slide is driven to move synchronously with the needle bar frame by the second translation actuator, so that the thread feed shaft and the swing arm move synchronously with the needle bar frame.

[0027] Preferably, the wire feeding shaft is rotatably arranged on the frame, the swing arm is rotatably arranged on the frame through the shaft, the swing arm mechanism corresponds to the swing arm one by one, and the swing arm mechanism drives a corresponding swing arm to rotate so that the corresponding wire pressing wheel is pressed against the surface of the wire feeding shaft.

[0028] Preferably, the shaft rod is parallel to the wire feeding shaft, and each swing arm of each wire pressing unit shares one shaft rod. In this way, only one shaft rod needs to be installed when installing the shaft rod, which can simplify the shaft rod installation steps.

[0029] Preferably, the wire pressing unit further comprises a plurality of elastic members, which provide elastic force to drive the swing arm to rotate, so as to separate the wire pressing wheel from the wire feeding shaft. In the same wire pressing unit, the swing arms other than the one corresponding to the swing arm mechanism will rotate under the action of the corresponding elastic members, so as to separate the wire pressing wheel from the wire feeding shaft; based on this, in the process of the rotating mechanism driving the wire feeding shaft to rotate, it can be ensured that only the embroidery thread between the wire pressing wheel on the swing arm corresponding to the swing arm mechanism and the wire feeding shaft is actively output (the swing arm mechanism drives the corresponding swing arm to rotate, so that the corresponding wire pressing wheel is pressed against the surface of the wire feeding shaft); and the embroidery thread between the wire pressing wheel on the remaining swing arms and the wire feeding shaft is not actively output.

[0030] Preferably, the swing arm mechanism is a pneumatic cylinder or an oil cylinder or an electric cylinder or an electric push rod or a push-pull electromagnet; or the swing arm mechanism includes an eccentric wheel that can be connected to the swing arm and a swing arm motor that drives the eccentric wheel to rotate.

[0031] Preferably, the wire feeding drive unit includes a wire feeding motor, which is connected to the wire feeding shaft to drive the wire feeding shaft to rotate.

[0032] The beneficial effects of the utility model are:

[0033] First, it adopts active thread feeding mode to actively provide embroidery thread for each stitch in the embroidery process to improve the quality of embroidery products and adapt to the use requirements of current multi-station embroidery machines.

[0034] Second, it can reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of an implementation method of an active thread feeding device applied to a multi-head embroidery machine according to a specific embodiment 1 of the utility model.

[0036] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0037] Figure 3 It is a structural schematic diagram of another implementation manner of an active thread feeding device applied to a multi-head embroidery machine according to the specific embodiment 1 of the utility model.

[0038] Figure 4 The utility model is a structural schematic diagram of an active thread feeding device applied to a multi-head embroidery machine according to a second specific embodiment of the present invention.

[0039] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle.

[0040] Figure 6It is a structural schematic diagram of an active thread feeding device applied to a multi-head embroidery machine according to a third specific embodiment of the utility model.

[0041] In the figure:

[0042] Rack 1;

[0043] Needle bar holder 2;

[0044] Wire feed shaft 3;

[0045] Wire feeding drive unit 4;

[0046] Wire creasing unit 5, shaft 5.1, swing arm 5.2, swing arm mechanism 5.3, wire creasing wheel 5.4;

[0047] A first translation device 6, a first guide rail 6.1, a first slide seat 6.2, and a first translation actuator 6.3;

[0048] Embroidery thread 7;

[0049] The second translation mechanism 8, along the second guide rail 8.1, the second slide seat 8.2, and the second translation actuator 8.3. DETAILED DESCRIPTION

[0050] Specific embodiment 1, as Figure 1 , Figure 2 As shown, an active thread feeding device applied to a multi-head embroidery machine includes a thread feeding shaft 3, a thread feeding driving unit 4 and a plurality of thread pressing units 5 sequentially distributed along the axial direction of the thread feeding shaft 3.

[0051] The embroidery machine includes a frame 1 and a plurality of machine heads. Each machine head includes a needle bar frame 2. The needle bar frame 2 moves along the horizontal track of the embroidery machine. The embroidery machine is provided with a needle bar frame 2 driving mechanism. The needle bar frame 2 driving mechanism drives the needle bar frame 2 to move along the guide rail. The needle bar frame 2 and the needle bar frame 2 driving mechanism are both prior arts, so the present application does not elaborate on the conventional technical means such as the specific method and structure of the needle bar frame 2 and the needle bar frame 2 driving mechanism.

[0052] The thread feed shaft 3 extends along the arrangement direction of each head of the embroidery machine. In this embodiment, the thread feed shaft 3 is rotatably arranged on the frame 1, and the thread feed shaft 3 is parallel to the moving direction of the needle bar frame 2.

[0053] The wire feeding drive unit 4 drives the wire feeding shaft 3 to rotate. The wire feeding drive is arranged on the frame 1. Specifically, the wire feeding drive unit 4 includes a wire feeding motor, which is connected to the wire feeding shaft 3 to drive the wire feeding shaft 3 to rotate.

[0054] The wire pressing unit 5 includes a plurality of swing arms 5.2 and swing arm mechanisms 5.3 that are rotatably arranged through the shaft 5.1. The swing arms 5.2 are sequentially distributed along the axial direction of the wire feeding shaft 3. In the present embodiment, the swing arm 5.2 is rotatably arranged on the frame 1 through the shaft 5.1. A wire pressing wheel 5.4 is arranged on the swing arm 5.2. The wire pressing wheel 5.4 is rotatably arranged on the swing arm 5.2. The rotating shaft of the wire pressing wheel 5.4 is parallel to the wire feeding shaft 3. There is one swing arm mechanism 5.3 for the same wire pressing unit 5. The swing arm mechanism 5.3 moves synchronously with the needle bar frame 2 so that the swing arm mechanism 5.3 corresponds to each swing arm 5.2 of the same wire pressing unit 5 in turn. The swing arm mechanism 5.3 drives a corresponding swing arm 5.2 to rotate so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3. Each wire pressing wheel 5.4 of each wire pressing unit 5 cooperates with the same wire feeding shaft 3.

[0055] In one implementation of the present embodiment, the swing arm mechanism 5.3 is a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet. The telescopic rod of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constituting the swing arm mechanism 5.3 faces the swing arm 5.2. When the swing arm mechanism 5.3 corresponds to one of the swing arms 5.2, the telescopic rod of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet extends and abuts against the swing arm 5.2, thereby driving the swing arm 5.2 to rotate, so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3.

[0056] In another implementation of this embodiment, the swing arm mechanism 5.3 includes an eccentric wheel that can be connected to the swing arm 5.2 and a swing arm motor that drives the eccentric wheel to rotate. When the swing arm mechanism 5.3 corresponds to one of the swing arms 5.2, the swing arm motor drives the eccentric wheel to rotate in the forward direction, the eccentric wheel abuts against the swing arm 5.2, and then drives the swing arm 5.2 to rotate, so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3.

[0057] Of course, it should be noted that the swing arm mechanism 5.3 can also be other swing arm mechanisms 5.3 on the market.

[0058] Each thread pressing unit 5 corresponds to a needle bar frame 2 of a machine head. In this embodiment, the thread pressing unit 5 corresponds to the needle bar frame 2 of the machine head one by one. Of course, it should be noted that in actual application, the thread pressing unit 5 of this embodiment can also be applied to a part of the machine heads in the embroidery machine.

[0059] In this embodiment, the swing arm 5.2 in the same thread pressing unit 5 corresponds one-to-one with the embroidery needle on the corresponding needle bar frame 2, and the thread pressing wheel 5.4 in the same thread pressing unit 5 corresponds one-to-one with the embroidery needle on the needle bar frame 2 of the corresponding machine head.

[0060] The embroidery thread 7 of the embroidery machine is located between the thread feeding shaft 3 and the corresponding thread pressing wheel 5.4 (one embroidery thread is arranged between each thread pressing wheel 5.4 and the thread feeding shaft 3). The embroidery thread 7 of the embroidery machine first passes between the thread feeding shaft 3 and the thread pressing wheel 5.4, and then passes through the corresponding embroidery needle.

[0061] The specific operation of the active thread feeding device applied to a multi-head embroidery machine of this embodiment is as follows, and the operation process of a certain embroidery needle of the head of the embroidery machine is described as an example.

[0062] When the needle bar frame 2 is translated to make the embroidery needle in the working position, the swing arm mechanism 5.3 moves synchronously with the needle bar frame 2, and the swing arm mechanism 5.3 is translated to the swing arm 5.2 corresponding to the embroidery needle; then, the swing arm mechanism 5.3 drives the corresponding swing arm 5.2 to rotate, so that the corresponding thread pressing wheel 5.4 is pressed tightly on the surface of the thread feeding shaft 3, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feeding shaft 3 and the thread pressing wheel 5.4; then, the thread feeding drive unit 4 drives the thread feeding shaft 3 to rotate, actively outputs the embroidery thread, and through the angle of rotation of the thread feeding shaft 3 , to control the length of the embroidery thread output each time, and the length of the embroidery thread output at one time is consistent with a corresponding stitch length during the embroidery process; in this way, the active thread feeding method is adopted to actively provide embroidery thread with a length consistent with the stitch length for each needle during the embroidery process, so that the embroidery thread will not pull the fabric, and ensure that the embroidery thread of the embroidery pattern is dense and not loose, thereby improving the quality of the embroidery, and effectively solving the problems of low manual adjustment efficiency, poor consistency of embroidery thread tension adjustment, and inability to ensure embroidery quality in the existing technology where the embroidery machine uses a thread presser to manually adjust the tightness of the embroidery thread. The thread feeding system of this solution adopts an active thread feeding method to actively provide embroidery thread for each needle during the embroidery process, so there is no need to manually adjust the tightness of the embroidery thread, which can well adapt to the use requirements of the current multi-station embroidery machine and the production rhythm of the current multi-station embroidery machine.

[0063] On the other hand, a row of embroidery needles are generally arranged on the needle bar frame 2 of the existing embroidery machine. The embroidery machine drives the needle bar frame 2 to move horizontally through the embroidery machine color changing system to realize the operation of different embroidery needles on the needle bar frame 2 (different embroidery needles correspond to embroidery threads of different colors); and in this embodiment, since the swing arm mechanism 5.3 moves synchronously with the needle bar frame 2, the swing arm mechanism 5.3 corresponds to each swing arm 5.2 of the same thread pressing unit 5 in turn. In this way, the same thread pressing unit 5 only needs one swing arm mechanism 5.3, and there is no need for each swing arm 5.2 to correspond to a swing arm mechanism 5.3, which can effectively reduce the number of swing arm mechanisms 5.3, thereby further reducing the manufacturing cost.

[0064] In addition, each crimping wheel 5.4 of each crimping unit 5 cooperates with the same thread feeding shaft 3, so that only one thread feeding drive unit 4 is needed to drive the thread feeding shaft 3 to rotate, so that the embroidery needles of each machine head can be synchronously and actively fed with threads, which can effectively reduce the number of thread feeding drive units 4, thereby reducing the manufacturing cost. Each crimping wheel 5.4 of each crimping unit 5 cooperates with the same thread feeding shaft 3, and only one thread feeding shaft 3 needs to be installed during installation, which can simplify the installation steps of the thread feeding shaft 3.

[0065] Furthermore, the wire pressing unit 5 also includes a plurality of elastic members. Each swing arm 5.2 corresponds to one elastic member or a plurality of elastic members (the elastic members are not shown in the figure). In this embodiment, the swing arm 5.2 corresponds to the elastic member one by one. The elastic member provides elastic force to drive the swing arm 5.2 to rotate so that the wire pressing wheel 5.4 is separated from the wire feeding shaft 3. The elastic member is a torsion spring, a tension spring, a compression spring, an elastic sheet, or a rubber band. In the same thread pressing unit 5, the remaining swing arms 5.2 except the one swing arm 5.2 corresponding to the swing arm mechanism 5.3 will rotate under the action of the corresponding elastic member to separate the thread pressing wheel 5.4 from the thread feeding shaft 3; based on this, in the process of the thread feeding drive unit 4 driving the thread feeding shaft 3 to rotate, it can be ensured that only the embroidery thread between the thread pressing wheel 5.4 on the swing arm 5.2 corresponding to the swing arm mechanism 5.3 and the thread feeding shaft 3 is actively output (the swing arm mechanism 5.3 drives the corresponding one swing arm 5.2 to rotate, so that the corresponding thread pressing wheel 5.4 is pressed tightly on the surface of the thread feeding shaft 3); and the embroidery thread between the thread pressing wheel 5.4 on the remaining swing arms 5.2 and the thread feeding shaft 3 is not actively output.

[0066] When the embroidery needle stops working, the telescopic rod of the air cylinder, oil cylinder, electric cylinder, electric push rod or push-pull electromagnet constituting the swing arm mechanism 5.3 shrinks, or the swing arm motor constituting the swing arm mechanism 5.3 drives the eccentric wheel to rotate in the opposite direction, and the swing arm 5.2 rotates under the action of the elastic member to separate the thread pressing wheel 5.4 from the thread feeding shaft 3. After that, during the process of the thread feeding drive unit 4 driving the thread feeding shaft 3 to rotate, the embroidery thread corresponding to the thread pressing wheel 5.4 is not output (the thread pressing wheel 5.4 is separated from the thread feeding shaft 3, and the embroidery thread between them will not be output by the rotating thread feeding shaft 3). The remaining swing arms 5.2 except the one swing arm 5.2 corresponding to the swing arm mechanism 5.3 will rotate under the action of the corresponding elastic member to separate the corresponding thread pressing wheel 5.4 from the thread feeding shaft 3.

[0067] Further, such as Figure 1 , Figure 2 As shown, the shaft 5.1 is parallel to the wire feeding shaft 3, and each swing arm 5.2 of each wire pressing unit 5 shares a shaft 5.1. In this way, when installing the shaft 5.1, only one shaft 5.1 needs to be installed, which can simplify the installation steps of the shaft 5.1.

[0068] In one implementation of this embodiment, Figure 3As shown, the swing arm mechanism 5.3 is directly fixedly mounted on the corresponding needle bar frame 2, so that the swing arm mechanism 5.3 moves synchronously with the needle bar frame 2. In this way, the swing arm mechanism 5.3 can move synchronously with the needle bar frame 2, and there is no need to arrange an additional power mechanism to drive the swing arm mechanism 5.3 to move synchronously with the needle bar frame 2, which can further reduce the manufacturing cost; at the same time, it is also convenient for actual manufacturing.

[0069] In another implementation of this embodiment, Figure 1 , Figure 2 As shown, an active thread feeding device applied to a multi-head embroidery machine also includes a first translation device 6. The first translation device 6 includes a first guide rail 6.1 arranged on the frame 1, a first slide 6.2 sliding along the first guide rail 6.1, and a first translation actuator 6.3. The first guide rail 6.1 is parallel to the thread feeding shaft 3. The swing arm mechanism 5.3 of each thread pressing unit 5 is arranged on the first slide 6.2. The first translation actuator 6.3 drives the first slide 6.2 to move synchronously with the needle bar frame 2, so that the swing arm mechanism 5.3 moves synchronously with the needle bar frame 2. In this way, the positions of the first guide rail 6.1 and the first slide 6.2 can be arranged according to actual needs, and then the first slide 6.2 is driven to move synchronously with the needle bar frame 2 by the first translation actuator 6.3, so that the swing arm mechanism 5.3 moves synchronously with the needle bar frame 2.

[0070] The first translation actuator 6.3 is an electric cylinder or an electric push rod or a linear module. In this embodiment, the first translation actuator 6.3 includes a first translation motor, a first screw rod and a first nut matched with the first screw rod. The first screw rod is rotatably arranged on the frame 1, and the first screw rod is parallel to the first guide rail 6.1. The first translation motor drives the first screw rod to rotate. The first nut is connected to the first slide 6.2 through a connecting member.

[0071] Specific embodiment 2, as Figure 4 , Figure 5 As shown, an active thread feeding device applied to a multi-head embroidery machine includes a thread feeding shaft 3, a thread feeding driving unit 4 and a plurality of thread pressing units 5 sequentially distributed along the axial direction of the thread feeding shaft 3.

[0072] The embroidery machine includes a frame 1 and a plurality of machine heads. Each machine head includes a needle bar frame 2. The needle bar frame 2 moves along the horizontal track of the embroidery machine. The embroidery machine is provided with a needle bar frame 2 driving mechanism. The needle bar frame 2 driving mechanism drives the needle bar frame 2 to move along the guide rail. The needle bar frame 2 and the needle bar frame 2 driving mechanism are both prior arts, so the present application does not elaborate on the conventional technical means such as the specific method and structure of the needle bar frame 2 and the needle bar frame 2 driving mechanism.

[0073] The thread feeding shaft 3 extends along the arrangement direction of each head of the embroidery machine. The thread feeding shaft 3 is parallel to the moving direction of the needle bar frame 2. The thread feeding drive unit 4 drives the thread feeding shaft 3 to rotate. Specifically, the thread feeding drive unit 4 includes a thread feeding motor, which is connected to the thread feeding shaft 3 to drive the thread feeding shaft 3 to rotate.

[0074] The wire pressing unit 5 includes a plurality of swing arms 5.2 and a swing arm mechanism 5.3 which are rotatably arranged through a shaft rod 5.1. The swing arms 5.2 are sequentially distributed along the axial direction of the wire feeding shaft 3. A wire pressing wheel 5.4 is arranged on the swing arm 5.2. The wire pressing wheel 5.4 is rotatably arranged on the swing arm 5.2. The rotating shaft of the wire pressing wheel 5.4 is parallel to the wire feeding shaft 3. The swing arm mechanism 5.3 is fixedly arranged on the frame 1. The swing arm mechanism 5.3 of the same wire pressing unit 5 is one.

[0075] In this embodiment, the swing arm mechanism 5.3 is fixedly arranged on the frame 1, and the same wire pressing unit 5 has one swing arm mechanism 5.3; the wire feeding shaft 3 and the swing arm 5.2 move synchronously with the needle bar frame 2. Specifically, an active wire feeding device applied to a multi-head embroidery machine also includes a second translation mechanism 8 arranged on the frame 1. The second translation mechanism 8 includes a second guide rail 8.1 arranged on the frame 1, a second slide seat 8.2 sliding along the second guide rail 8.1, and a second translation actuator 8.3. The second guide rail 8.1 is parallel to the wire feeding shaft 3. The wire feeding shaft 3 is rotatably arranged on the second slide seat 8.2. The wire feeding drive unit 4 is arranged on the second slide seat 8.2. The swing arm 5.2 is rotatably arranged on the second slide seat 8.2 through the shaft 5.1.

[0076] The second translation actuator 8.3 drives the second slide 8.2 to move synchronously with the needle bar frame 2, so that the thread feeding shaft 3 and the swing arm 5.2 move synchronously with the needle bar frame 2. The thread feeding shaft 3 and the swing arm 5.2 move synchronously with the needle bar frame 2, so that the swing arm mechanism 5.3 corresponds to each swing arm 5.2 of the same thread pressing unit 5 in sequence. The swing arm mechanism 5.3 drives a corresponding swing arm 5.2 to rotate, so that the corresponding thread pressing wheel 5.4 is pressed tightly on the surface of the thread feeding shaft 3. Each thread pressing wheel 5.4 of each thread pressing unit 5 cooperates with the same thread feeding shaft 3.

[0077] The second translation actuator 8.3 is an electric cylinder or an electric push rod or a linear module. In this embodiment, the second translation actuator 8.3 includes a second translation motor, a second screw rod and a second nut matched with the second screw rod. The second screw rod is rotatably arranged on the frame 1, and the second screw rod is parallel to the second guide rail 8.1. The second translation motor drives the second screw rod to rotate. The second nut is connected to the second slide 8.2 through a connecting piece.

[0078] In one implementation of the present embodiment, the swing arm mechanism 5.3 is a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet. The telescopic rod of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constituting the swing arm mechanism 5.3 faces the swing arm 5.2. When the swing arm mechanism 5.3 corresponds to one of the swing arms 5.2, the telescopic rod of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet extends and abuts against the swing arm 5.2, thereby driving the swing arm 5.2 to rotate, so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3.

[0079] In another implementation of this embodiment, the swing arm mechanism 5.3 includes an eccentric wheel that can be connected to the swing arm 5.2 and a swing arm motor that drives the eccentric wheel to rotate. When the swing arm mechanism 5.3 corresponds to one of the swing arms 5.2, the swing arm motor drives the eccentric wheel to rotate in the forward direction, the eccentric wheel abuts against the swing arm 5.2, and then drives the swing arm 5.2 to rotate, so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3.

[0080] Of course, it should be noted that the swing arm mechanism 5.3 can also be other swing arm mechanisms 5.3 on the market.

[0081] Each thread pressing unit 5 corresponds to a needle bar frame 2 of a machine head. In this embodiment, the thread pressing unit 5 corresponds to the needle bar frame 2 of the machine head one by one. Of course, it should be noted that in actual application, the thread pressing unit 5 of this embodiment can also be applied to a part of the machine heads in the embroidery machine.

[0082] In this embodiment, the swing arm 5.2 in the same thread pressing unit 5 corresponds one-to-one with the embroidery needle on the corresponding needle bar frame 2, and the thread pressing wheel 5.4 in the same thread pressing unit 5 corresponds one-to-one with the embroidery needle on the needle bar frame 2 of the corresponding machine head.

[0083] The embroidery thread 7 of the embroidery machine is located between the thread feeding shaft 3 and the corresponding thread pressing wheel 5.4 (one embroidery thread is arranged between each thread pressing wheel 5.4 and the thread feeding shaft 3). The embroidery thread 7 of the embroidery machine first passes between the thread feeding shaft 3 and the thread pressing wheel 5.4, and then passes through the corresponding embroidery needle.

[0084] The specific operation of the active thread feeding device applied to a multi-head embroidery machine of this embodiment is as follows, and the operation process of a certain embroidery needle of the head of the embroidery machine is described as an example.

[0085] When the needle bar frame 2 is translated to make the embroidery needle in the working position, the thread feeding shaft 3 and the swing arm 5.2 move synchronously with the needle bar frame 2, so that the swing arm 5.2 corresponding to the embroidery needle moves to the swing arm mechanism 5.3; then, the swing arm mechanism 5.3 drives the corresponding swing arm 5.2 to rotate, so that the corresponding thread pressing wheel 5.4 is pressed against the surface of the thread feeding shaft 3, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feeding shaft 3 and the thread pressing wheel 5.4; then, the thread feeding drive unit 4 drives the thread feeding shaft 3 to rotate, actively outputs the embroidery thread, and rotates the thread feeding shaft 3 to Angle, to control the length of each output of embroidery thread, the length of each output of embroidery thread is consistent with a corresponding stitch length in the embroidery process; in this way, the active thread feeding method is adopted to actively provide embroidery thread with a length consistent with the stitch length for each needle in the embroidery process, so that the embroidery thread will not pull the fabric, and ensure that the embroidery thread of the embroidery pattern is dense and not loose, thereby improving the quality of embroidery, and effectively solving the problems of low manual adjustment efficiency, poor consistency of embroidery thread tension adjustment, and inability to ensure embroidery quality in the existing technology where embroidery machines use thread pressers to manually adjust the tightness of embroidery threads. The thread feeding system of this scheme adopts an active thread feeding method to actively provide embroidery thread for each needle in the embroidery process, so there is no need to manually adjust the tightness of the embroidery thread, which can well adapt to the use requirements of current multi-station embroidery machines and the production rhythm of current multi-station embroidery machines.

[0086] On the other hand, a row of embroidery needles are generally arranged on the needle bar frame 2 of the existing embroidery machine. The embroidery machine drives the needle bar frame 2 to move horizontally through the embroidery machine color changing system to realize the operation of different embroidery needles on the needle bar frame 2 (different embroidery needles correspond to embroidery threads of different colors); and in this embodiment, since the swing arm mechanism 5.3 moves synchronously with the needle bar frame 2, the swing arm mechanism 5.3 corresponds to each swing arm 5.2 of the same thread pressing unit 5 in turn. In this way, the same thread pressing unit 5 only needs one swing arm mechanism 5.3, and there is no need for each swing arm 5.2 to correspond to a swing arm mechanism 5.3, which can effectively reduce the number of swing arm mechanisms 5.3, thereby further reducing the manufacturing cost.

[0087] In addition, each crimping wheel 5.4 of each crimping unit 5 cooperates with the same thread feeding shaft 3, so that only one thread feeding drive unit 4 is needed to drive the thread feeding shaft 3 to rotate, so that the embroidery needles of each machine head can be synchronously and actively fed with threads, which can effectively reduce the number of thread feeding drive units 4, thereby reducing the manufacturing cost. Each crimping wheel 5.4 of each crimping unit 5 cooperates with the same thread feeding shaft 3, and only one thread feeding shaft 3 needs to be installed during installation, which can simplify the installation steps of the thread feeding shaft 3.

[0088] Furthermore, the wire pressing unit 5 also includes a plurality of elastic members. Each swing arm 5.2 corresponds to one elastic member or a plurality of elastic members (the elastic members are not shown in the figure). In this embodiment, the swing arm 5.2 corresponds to the elastic member one by one. The elastic member provides elastic force to drive the swing arm 5.2 to rotate so that the wire pressing wheel 5.4 is separated from the wire feeding shaft 3. The elastic member is a torsion spring, a tension spring, a compression spring, an elastic sheet, or a rubber band. In the same thread pressing unit 5, the remaining swing arms 5.2 except the one swing arm 5.2 corresponding to the swing arm mechanism 5.3 will rotate under the action of the corresponding elastic member to separate the thread pressing wheel 5.4 from the thread feeding shaft 3; based on this, in the process of the thread feeding drive unit 4 driving the thread feeding shaft 3 to rotate, it can be ensured that only the embroidery thread between the thread pressing wheel 5.4 on the swing arm 5.2 corresponding to the swing arm mechanism 5.3 and the thread feeding shaft 3 is actively output (the swing arm mechanism 5.3 drives the corresponding one swing arm 5.2 to rotate, so that the corresponding thread pressing wheel 5.4 is pressed tightly on the surface of the thread feeding shaft 3); and the embroidery thread between the thread pressing wheel 5.4 on the remaining swing arms 5.2 and the thread feeding shaft 3 is not actively output.

[0089] When the embroidery needle stops working, the telescopic rod of the air cylinder, oil cylinder, electric cylinder, electric push rod or push-pull electromagnet constituting the swing arm mechanism 5.3 shrinks, or the swing arm motor constituting the swing arm mechanism 5.3 drives the eccentric wheel to rotate in the opposite direction, and the swing arm 5.2 rotates under the action of the elastic member to separate the thread pressing wheel 5.4 from the thread feeding shaft 3. After that, during the process of the thread feeding drive unit 4 driving the thread feeding shaft 3 to rotate, the embroidery thread corresponding to the thread pressing wheel 5.4 is not output (the thread pressing wheel 5.4 is separated from the thread feeding shaft 3, and the embroidery thread between them will not be output by the rotating thread feeding shaft 3). The remaining swing arms 5.2 except the one swing arm 5.2 corresponding to the swing arm mechanism 5.3 will rotate under the action of the corresponding elastic member to separate the corresponding thread pressing wheel 5.4 from the thread feeding shaft 3.

[0090] Further, such as Figure 4 , Figure 5 As shown, the shaft 5.1 is parallel to the wire feeding shaft 3, and each swing arm 5.2 of each wire pressing unit 5 shares a shaft 5.1. In this way, when installing the shaft 5.1, only one shaft 5.1 needs to be installed, which can simplify the installation steps of the shaft 5.1.

[0091] Specific embodiment three, as Figure 6 As shown, an active thread feeding device applied to a multi-head embroidery machine includes a thread feeding shaft 3, a thread feeding driving unit 4 and a plurality of thread pressing units 5 sequentially distributed along the axial direction of the thread feeding shaft 3.

[0092] The embroidery machine includes a frame 1 and a plurality of machine heads. Each machine head includes a needle bar frame 2. The needle bar frame 2 moves along the horizontal track of the embroidery machine. The embroidery machine is provided with a needle bar frame 2 driving mechanism. The needle bar frame 2 driving mechanism drives the needle bar frame 2 to move along the guide rail. The needle bar frame 2 and the needle bar frame 2 driving mechanism are both prior arts, so the present application does not elaborate on the conventional technical means such as the specific method and structure of the needle bar frame 2 and the needle bar frame 2 driving mechanism.

[0093] The thread feed shaft 3 extends along the arrangement direction of each head of the embroidery machine. In this embodiment, the thread feed shaft 3 is rotatably arranged on the frame 1, and the thread feed shaft 3 is parallel to the moving direction of the needle bar frame 2.

[0094] The wire feeding drive unit 4 drives the wire feeding shaft 3 to rotate. The wire feeding drive is arranged on the frame 1. Specifically, the wire feeding drive unit 4 includes a wire feeding motor, which is connected to the wire feeding shaft 3 to drive the wire feeding shaft 3 to rotate.

[0095] The wire pressing unit 5 includes a plurality of swing arms 5.2 and a swing arm mechanism 5.3 which are rotatably arranged through the shaft 5.1. The swing arms 5.2 are sequentially distributed along the axial direction of the wire feeding shaft 3. In the present embodiment, the swing arm 5.2 is rotatably arranged on the frame 1 through the shaft 5.1. A wire pressing wheel 5.4 is arranged on the swing arm 5.2. The wire pressing wheel 5.4 is rotatably arranged on the swing arm 5.2. The rotating shaft of the wire pressing wheel 5.4 is parallel to the wire feeding shaft 3. In the present embodiment, the swing arm mechanism 5.3 corresponds to the swing arm 5.2 one by one, and the swing arm mechanism 5.3 drives a corresponding swing arm 5.2 to rotate so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3. Each wire pressing wheel 5.4 of each wire pressing unit 5 cooperates with the same wire feeding shaft 3.

[0096] In one implementation of the present embodiment, the swing arm mechanism 5.3 is a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet. The telescopic rod of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constituting the swing arm mechanism 5.3 faces the swing arm 5.2. When the swing arm mechanism 5.3 corresponds to one of the swing arms 5.2, the telescopic rod of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet extends and abuts against the swing arm 5.2, thereby driving the swing arm 5.2 to rotate, so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3.

[0097] In another implementation of this embodiment, the swing arm mechanism 5.3 includes an eccentric wheel that can be connected to the swing arm 5.2 and a swing arm motor that drives the eccentric wheel to rotate. When the swing arm mechanism 5.3 corresponds to one of the swing arms 5.2, the swing arm motor drives the eccentric wheel to rotate in the forward direction, the eccentric wheel abuts against the swing arm 5.2, and then drives the swing arm 5.2 to rotate, so that the corresponding wire pressing wheel 5.4 is pressed against the surface of the wire feeding shaft 3.

[0098] Of course, it should be noted that the swing arm mechanism 5.3 can also be other swing arm mechanisms 5.3 on the market.

[0099] Each thread pressing unit 5 corresponds to a needle bar frame 2 of a machine head. In this embodiment, the thread pressing unit 5 corresponds to the needle bar frame 2 of the machine head one by one. Of course, it should be noted that in actual application, the thread pressing unit 5 of this embodiment can also be applied to a part of the machine heads in the embroidery machine.

[0100] In this embodiment, the swing arm 5.2 in the same thread pressing unit 5 corresponds one-to-one with the embroidery needle on the corresponding needle bar frame 2, and the thread pressing wheel 5.4 in the same thread pressing unit 5 corresponds one-to-one with the embroidery needle on the needle bar frame 2 of the corresponding machine head.

[0101] The embroidery thread of the embroidery machine is located between the thread feeding shaft 3 and the corresponding thread pressing wheel 5.4 (one embroidery thread is arranged between each thread pressing wheel 5.4 and the thread feeding shaft 3). The embroidery thread of the embroidery machine first passes between the thread feeding shaft 3 and the thread pressing wheel 5.4, and then passes through the corresponding embroidery needle.

[0102] The specific operation of the active thread feeding device applied to a multi-head embroidery machine of this embodiment is as follows, and the operation process of a certain embroidery needle of the head of the embroidery machine is described as an example.

[0103] When the needle bar frame 2 is translated and the embroidery needle is in the working position, the swing arm mechanism 5.3 corresponding to the embroidery needle drives a corresponding swing arm 5.2 to rotate, so that the corresponding thread pressing wheel 5.4 is pressed against the surface of the thread feeding shaft 3, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feeding shaft 3 and the thread pressing wheel 5.4; then, the thread feeding drive unit 4 drives the thread feeding shaft 3 to rotate, actively outputs the embroidery thread, and controls the length of the embroidery thread output each time by the rotation angle of the thread feeding shaft 3, and the length of the embroidery thread output each time is consistent with a corresponding stitch length in the embroidery process; in this way, the active thread feeding method is adopted, and embroidery thread with a length consistent with the stitch length is actively provided for each needle in the embroidery process, so that the embroidery thread will not pull the fabric, and ensure that the embroidery thread of the embroidery pattern is dense and not loose, thereby improving the quality of the embroidery, and effectively solving the problems of low manual adjustment efficiency, poor consistency of embroidery thread tightness adjustment, and inability to ensure the quality of the embroidery in the prior art embroidery machine using a thread presser to manually adjust the tightness of the embroidery thread. The thread feeding system of this solution adopts an active thread feeding method to actively provide embroidery thread for each stitch in the embroidery process, so there is no need to manually adjust the tightness of the embroidery thread. It can well adapt to the use requirements of current multi-station embroidery machines and the production rhythm of current multi-station embroidery machines.

[0104] In addition, each crimping wheel 5.4 of each crimping unit 5 cooperates with the same thread feeding shaft 3, so that only one thread feeding drive unit 4 is needed to drive the thread feeding shaft 3 to rotate, so that the embroidery needles of each machine head can be synchronously and actively fed with threads, which can effectively reduce the number of thread feeding drive units 4, thereby reducing the manufacturing cost. Each crimping wheel 5.4 of each crimping unit 5 cooperates with the same thread feeding shaft 3, and only one thread feeding shaft 3 needs to be installed during installation, which can simplify the installation steps of the thread feeding shaft 3.

[0105] Furthermore, the thread pressing unit 5 also includes a plurality of elastic members. Each swing arm 5.2 corresponds to one elastic member or a plurality of elastic members (the elastic members are not shown in the figure). In this embodiment, the swing arm 5.2 corresponds to the elastic member one by one. The elastic member provides elastic force to drive the swing arm 5.2 to rotate so that the thread pressing wheel 5.4 is separated from the thread feeding shaft 3. The elastic member is a torsion spring, a tension spring, a compression spring, an elastic sheet, or a rubber band. When the embroidery needle stops working, the telescopic rod of the air cylinder, oil cylinder, electric cylinder, electric push rod, or push-pull electromagnet constituting the swing arm mechanism 5.3 shrinks, or the swing arm motor constituting the swing arm mechanism 5.3 drives the eccentric wheel to rotate in the opposite direction. At this time, the swing arm 5.2 rotates under the action of the elastic member to separate the thread pressing wheel 5.4 from the thread feeding shaft 3. Thereafter, during the process of the thread feeding drive unit 4 driving the thread feeding shaft 3 to rotate, the embroidery thread corresponding to the thread pressing wheel 5.4 is not output (the thread pressing wheel 5.4 is separated from the thread feeding shaft 3, and the embroidery thread between them will not be output by the rotating thread feeding shaft 3).

[0106] Further, such as Figure 6 As shown, the shaft 5.1 is parallel to the wire feeding shaft 3, and each swing arm 5.2 of each wire pressing unit 5 shares a shaft 5.1. In this way, when installing the shaft 5.1, only one shaft 5.1 needs to be installed, which can simplify the installation steps of the shaft 5.1.

[0107] The above description is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent transformation made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. An active thread feeding device applied to a multi-head embroidery machine, the embroidery machine comprising a frame and a needle bar frame, characterized in that: include: A thread feed shaft extends along the arrangement direction of each head of the embroidery machine; A wire feeding drive unit drives the wire feeding shaft to rotate; A plurality of wire pressing units are sequentially distributed along the axial direction of the wire feeding shaft, comprising a plurality of swing arms and a swing arm mechanism which are arranged by rotating the shaft, each swing arm is sequentially distributed along the axial direction of the wire feeding shaft, a wire pressing wheel is arranged on the swing arm, and the swing arm mechanism drives the swing arm to rotate so that the wire pressing wheel is pressed tightly on the surface of the wire feeding shaft, and each wire pressing wheel of each wire pressing unit cooperates with the same wire feeding shaft; The embroidery thread of the embroidery machine first passes between the thread feed shaft and the thread pressing wheel, and then passes through the corresponding embroidery needle.

2. The active thread feeding device for a multi-head embroidery machine according to claim 1, characterized in that: The wire feeding shaft is rotatably arranged on the frame, and the swing arm is rotatably arranged on the frame through an axle rod. The same wire pressing unit has one swing arm mechanism, and the swing arm mechanism moves synchronously with the needle bar frame so that the swing arm mechanism corresponds to each swing arm of the same wire pressing unit in turn; the swing arm mechanism drives a corresponding swing arm to rotate so that the corresponding wire pressing wheel is pressed tightly against the surface of the wire feeding shaft.

3. The active thread feeding device for a multi-head embroidery machine according to claim 2, characterized in that: The swing arm mechanism is fixed on the needle bar frame.

4. The active thread feeding device for a multi-head embroidery machine according to claim 2, characterized in that: Also included is a first translation device comprising: A first guide rail is arranged on the frame and is parallel to the wire feeding shaft; A first slide seat sliding along the first guide rail, wherein the swing arm mechanism of each wire pressing unit is arranged on the first slide seat; The first translation actuator drives the first slide to move synchronously with the needle bar frame, so that the swing arm mechanism and the needle bar frame move synchronously.

5. The active thread feeding device for a multi-head embroidery machine according to claim 1, characterized in that: The swing arm mechanism is fixedly arranged on the frame, and the same wire pressing unit has only one swing arm mechanism. The wire feeding shaft and the swing arm move synchronously with the needle bar frame so that the swing arm mechanism corresponds to each swing arm of the same wire pressing unit in turn; the swing arm mechanism drives a corresponding swing arm to rotate so that the corresponding wire pressing wheel is pressed tightly against the surface of the wire feeding shaft.

6. The active thread feeding device for a multi-head embroidery machine according to claim 5, characterized in that: Also included is a second translation mechanism disposed on the frame, comprising: A second guide rail is arranged on the frame and is parallel to the wire feeding shaft; A second slide seat slides along the second guide rail, the wire feeding shaft is arranged on the second slide seat, and the swing arm is arranged on the second slide seat by rotating the shaft rod; The second translation actuator drives the second slide to move synchronously with the needle bar frame, so that the thread feeding shaft and the swing arm move synchronously with the needle bar frame.

7. The active thread feeding device for a multi-head embroidery machine according to claim 1, characterized in that: The wire feeding shaft is rotatably arranged on the frame, the swing arm is rotatably arranged on the frame through the shaft, the swing arm mechanism corresponds to the swing arm one by one, and the swing arm mechanism drives a corresponding swing arm to rotate so that the corresponding wire pressing wheel is pressed tightly on the surface of the wire feeding shaft.

8. An active thread feeding device for a multi-head embroidery machine according to any one of claims 1 to 7, characterized in that: The shaft is parallel to the wire feeding shaft, and the swing arms of the wire pressing units share a shaft.

9. An active thread feeding device for a multi-head embroidery machine according to any one of claims 1 to 7, characterized in that: The wire pressing unit also includes a plurality of elastic members, which provide elastic force to drive the swing arm to rotate so as to separate the wire pressing wheel from the wire feeding shaft.

10. An active thread feeding device for a multi-head embroidery machine according to any one of claims 1 to 7, characterized in that: The swing arm mechanism is an air cylinder, an oil cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet; or the swing arm mechanism includes an eccentric wheel that can be connected to the swing arm and a swing arm motor that drives the eccentric wheel to rotate.

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