Elastic pressing type active thread feeding device for embroidery machine

Abstract

The utility model discloses an elastic pressing type active thread feeding device for an embroidery machine, and aims to provide the elastic pressing type active thread feeding device for the 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 embroidery products and meets the use requirements of the current multi-station embroidery machine. The device comprises a support; the wire feeding wheel is rotationally arranged on the bracket; the wire feeding driving mechanism drives the wire feeding wheel to rotate; the swing arm is rotationally arranged on the support, and a wire pressing wheel matched with the wire feeding wheel is arranged on the swing arm; the swing arm driving mechanism is connected with an elastic abutting element, the elastic abutting element comprises an abutting piece capable of being connected with the swing arm in an abutting mode and an elastic supporting element supporting the abutting piece, and the swing arm driving mechanism drives the swing arm to rotate through the elastic abutting element so that the wire pressing wheel on the swing arm can be pressed on the wire feeding wheel or separated from the wire feeding wheel; an embroidery thread of the embroidery machine firstly passes through the space between the thread feeding wheel and the thread pressing wheel and then penetrates through the embroidery needle.

Description

Technical Field

[0001] The utility model relates to the field of embroidery machines, in particular to an elastic pressing type active thread feeding device for embroidery machines. 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 elastic pressing type active thread feeding device for an 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] The second purpose of the utility model is to provide an elastic pressure type active thread feeding device for an embroidery machine that can effectively solve the problem that the swing arm driving mechanism cannot reliably press the thread pressing wheel onto the thread feeding wheel due to manufacturing errors or looseness of the swing arm and the thread pressing wheel during long-term use, thereby affecting the thread feeding stability.

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

[0009] An elastic pressing type active thread feeding device for an embroidery machine comprises:

[0010] Bracket;

[0011] A wire feeding wheel is rotatably arranged on a bracket;

[0012] A wire feeding drive mechanism drives the wire feeding wheel to rotate;

[0013] A swing arm is rotatably arranged on the bracket, and a wire pressing wheel cooperating with the wire feeding wheel is arranged on the swing arm;

[0014] The swing arm driving mechanism and the elastic abutment element, the elastic abutment element includes an abutment piece that can be abutted and connected with the swing arm and an elastic supporting element that supports the abutment piece, the swing arm driving mechanism drives the swing arm to rotate through the elastic abutment element, so that the wire pressing wheel on the swing arm is pressed against the wire feeding wheel or separated from the wire feeding wheel;

[0015] The embroidery thread of the embroidery machine first passes between the thread feeding wheel and the thread pressing wheel, and then passes through the embroidery needle. The specific use of the elastic pressing type active thread feeding device for an embroidery machine of the present invention is as follows. The following description takes the working process of a certain embroidery needle of the head of the embroidery machine as an example.

[0016] The embroidery needle of the embroidery machine includes a working state and a non-working state. When the embroidery needle is in the working state, the swing arm driving mechanism is connected to the swing arm through an elastic abutment element and drives the swing arm to rotate, so that the thread pressing wheel on the swing arm is pressed against the thread feeding wheel, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feeding wheel and the thread pressing wheel; then, the thread feeding driving mechanism drives the thread feeding wheel 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 wheel, 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, in which the embroidery machine uses a thread presser to manually adjust the tightness of the embroidery thread. At the same time, the elastic pressure-type active thread feeding device for an embroidery machine of the present invention 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 the current multi-station embroidery machine and the production rhythm of the current multi-station embroidery machine.

[0017] On the other hand, in the process that the swing arm driving mechanism drives the swing arm to rotate through the elastic abutment element so that the wire pressing wheel is pressed against the wire feeding wheel, the elastic deformation of the elastic support element can make up for the gap between the swing arm and the wire pressing wheel due to manufacturing errors or long-term use, so that the wire pressing wheel can be stably and reliably pressed against the wire feeding wheel, thereby ensuring the stability of wire feeding. At the same time, it can also avoid the rigid collision between the swing arm driving mechanism and the swing arm, thereby reducing noise and avoiding the problem of deformation of the swing arm and the swing arm driving mechanism due to rigid collision.

[0018] Preferably, the swing arm driving mechanism comprises a telescopic driving rod, the abutment is slidably arranged on the driving rod, and the sliding direction of the abutment is parallel to the telescopic direction of the driving rod. In this way, the swing arm driving mechanism drives the abutment to be telescopic through the telescopic movement of the driving rod, so that the abutment is connected to the swing arm to drive the swing arm to rotate.

[0019] Preferably, a guide hole extending along the axial direction of the driving rod is provided at one end of the driving rod facing the swing arm, the abutment is slidably arranged in the guide hole, and the elastic support element is located between the bottom surface of the guide hole and the abutment. In this way, it is ensured that the abutment can be stably slidably connected to the driving rod, and the elastic support element can be stably installed on the driving rod.

[0020] Preferably, a detachably connected guide sleeve is provided at one end of the driving rod facing the swing arm, the guide sleeve is coaxial or parallel to the driving rod, the inner hole of the guide sleeve constitutes the guide hole, and the end surface of the driving rod constitutes the bottom surface of the guide hole. In this way, before the guide sleeve is installed on the driving rod, the elastic abutment element can be first installed in the guide sleeve, and then the guide sleeve can be installed on the end of the driving rod facing the swing arm, thereby realizing the installation of the elastic abutment element, and then facilitating the installation and replacement of the elastic abutment element.

[0021] Preferably, a stopper is provided on the inner wall of the guide hole, and a limiting block cooperating with the stopper is provided on the abutting member, and the limiting block abuts against the stopper under the action of the elastic supporting element.

[0022] Preferably, the swing arm driving mechanism is a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet, and the telescopic rod in the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constitutes the driving rod. In this way, the swing arm is driven to rotate by the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet, so that the wire pressing wheel is pressed against the surface of the wire feeding wheel, and the structure is simple and easy to operate.

[0023] Preferably, the elastic support element is a spring or an elastic sheet. In this way, when the swing arm driving mechanism drives the swing arm to rotate through the elastic abutment element so that the wire pressing wheel is pressed against the wire feeding wheel, the elastic deformation of the spring or the elastic sheet can compensate for the gap between the swing arm and the wire pressing wheel caused by manufacturing error or long-term use, so that the wire pressing wheel can be stably and reliably pressed against the wire feeding wheel, thereby ensuring the stability of wire feeding.

[0024] Preferably, the swing arm driving mechanism includes a telescopic driving rod, which is an air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet, wherein the telescopic rod in the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constitutes the driving rod, and the elastic abutment element is arranged on the end of the driving rod. In this way, the swing arm is driven to rotate by the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet, so that the wire pressing wheel is pressed against the surface of the wire feeding wheel, and the structure is simple and easy to operate.

[0025] Preferably, it also includes a swing arm elastic element, one of the swing arm driving mechanism and the swing arm elastic element drives the swing arm to rotate so that the wire pressing wheel is pressed against the wire feeding wheel; the other drives the swing arm to rotate so that the wire pressing wheel is separated from the surface of the wire feeding wheel. In this solution, the swing arm elastic element cooperates with the swing arm driving mechanism to drive the swing arm of the wire pressing wheel to rotate, so that the wire pressing wheel is pressed against the surface of the wire feeding wheel or separated from the surface of the wire feeding wheel.

[0026] Preferably, the swing arm elastic element is a torsion spring, a tension spring, a compression spring, an elastic sheet, or a rubber band.

[0027] Preferably, the swing arm is located below the wire feeding wheel, and the center of gravity of the assembly consisting of the swing arm and the wire pressing wheel on the swing arm is located on the same side of the swing arm's rotating shaft as the wire pressing wheel on the swing arm; the swing arm driving mechanism drives the swing arm to rotate through the abutment member so that the wire pressing wheel on the swing arm is pressed against the wire feeding wheel. The arrangement of this scheme can omit the swing arm elastic element, so that the swing arm rotates downward under the deadweight of the wire pressing wheel, thereby causing the wire pressing wheel to rotate downward and separate from the wire feeding wheel.

[0028] The beneficial effects of the utility model are:

[0029] Firstly, an active thread feeding method is adopted to actively provide embroidery thread of the same length as the needle distance for each stitch during the embroidery process, so that the embroidery thread will not pull the fabric, and the embroidery thread of the embroidery pattern is guaranteed to be 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 failure to ensure embroidery quality in the prior art embroidery machine using a thread presser to manually adjust the tightness of the embroidery thread.

[0030] Secondly, it adopts active thread feeding mode 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 the current multi-station embroidery machine and the production rhythm of the current multi-station embroidery machine.

[0031] Thirdly, it can effectively solve the problem that the swing arm driving mechanism cannot reliably press the wire pressing wheel onto the wire feeding wheel due to loosening of the swing arm and the wire pressing wheel during long-term use, thus affecting the wire feeding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The utility model is a three-dimensional structural schematic diagram of an elastic pressing type active thread feeding device for an embroidery machine.

[0033] Figure 2 The utility model is a front view of an elastic pressing type active thread feeding device for an embroidery machine.

[0034] Figure 3 The utility model is a schematic cross-sectional structure diagram of an elastic abutting element of an elastic abutting active thread feeding device for an embroidery machine.

[0035] In the figure:

[0036] Bracket 1;

[0037] Wire feeding wheel 2;

[0038] Swing arm 3;

[0039] Wire pressing wheel 4;

[0040] Wire feeding drive mechanism 5, rotating motor 5.1, transmission mechanism 5.2;

[0041] Swing arm drive mechanism 6, drive rod 6.1;

[0042] Elastic abutting element 7, abutting piece 7.1, elastic supporting element 7.2, limiting block 7.3;

[0043] Guide sleeve 8;

[0044] Swing arm elastic element 9;

[0045] Guide hole 10;

[0046] Stopper 11. DETAILED DESCRIPTION

[0047] Specific embodiment 1, as Figure 1 , Figure 2 , Figure 3 As shown, an elastic pressing type active thread feeding device for an embroidery machine comprises a bracket 1, a thread feeding wheel 2, a thread feeding driving mechanism 5, a swing arm 3, a swing arm elastic element 9, a swing arm driving mechanism 6 and an elastic abutting element 7.

[0048] The embroidery machine includes a needle bar frame. The needle bar frame moves along the guide rail of the embroidery machine, and the guide rail is horizontally distributed. The embroidery machine is provided with a needle bar frame driving mechanism. The needle bar frame driving mechanism drives the needle bar frame to move along the guide rail. The needle bar frame and the needle bar frame driving mechanism are both prior arts, so this application does not elaborate on the conventional technical means such as the specific method and structure of the needle bar frame and the needle bar frame driving mechanism.

[0049] The wire feeding wheel 2 is rotatably arranged on the bracket 1. The wire feeding driving mechanism 5 drives the wire feeding wheel 2 to rotate. The wire feeding driving mechanism 5 comprises a rotary motor 5.1.

[0050] The swing arm 3 is rotatably arranged on the bracket 1. The swing arm 3 is provided with a wire pressing wheel 4 that cooperates with the wire feeding wheel 2. The wire pressing wheel 4 is rotatably arranged on the swing arm 3. The rotating shaft of the wire pressing wheel 4 is parallel to the rotating shaft of the wire feeding wheel 2.

[0051] The swing arm elastic element 9 provides elastic force to drive the swing arm 3 to rotate. The swing arm elastic element 9 connects the swing arm 3 and the bracket 1. The swing arm elastic element 9 is a torsion spring, a tension spring, a compression spring, an elastic sheet, or a rubber band. Figure 1 The swing arm elastic element 9 shown in FIG. 1 is a tension spring.

[0052] The elastic abutting element 7 comprises an abutting piece 7.1 which can be abutted and connected with the swing arm 3 and an elastic supporting element 7.2 which supports the abutting piece 7.1.

[0053] The swing arm driving mechanism 6 includes a telescopic driving rod 6.1. In this embodiment, the swing arm driving mechanism 6 is a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet, and the telescopic rod in the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constitutes the driving rod 6.1. One end of the driving rod 6.1 faces the swing arm 3. The elastic abutment element 7 is arranged on one end of the driving rod 6.1 facing the swing arm 3.

[0054] Of course, it should be noted that the swing arm driving mechanism 6 can also be other swing arm driving mechanisms 6 on the market.

[0055] The swing arm driving mechanism 6 drives the swing arm 3 to rotate through the elastic abutment element 7, so that the wire pressing wheel 4 on the swing arm 3 is pressed against the wire feeding wheel 2 or separated from the wire feeding wheel 2; specifically, one of the swing arm driving mechanism 6 and the swing arm elastic element 9 drives the swing arm 3 to rotate, so that the wire pressing wheel 4 is pressed against the wire feeding wheel 2; the other drives the swing arm 3 to rotate, so that the wire pressing wheel 4 is separated from the surface of the wire feeding wheel 2. For example, the swing arm driving mechanism 6 is used to drive the swing arm 3 to rotate, so that the wire pressing wheel 4 on the swing arm 3 is pressed against the wire feeding wheel 2; the swing arm elastic element 9 is used to drive the swing arm 3 to rotate, so that the wire pressing wheel 4 on the swing arm 3 is separated from the wire feeding wheel 2. Or the swing arm driving mechanism 6 is used to drive the swing arm 3 to rotate, so that the wire pressing wheel 4 on the swing arm 3 is separated from the wire feeding wheel 2; the swing arm elastic element 9 is used to drive the swing arm 3 to rotate, so that the wire pressing wheel 4 on the swing arm 3 is pressed against the wire feeding wheel 2.

[0056] In this embodiment, the swing arm driving mechanism 6 is used to drive the swing arm 3 to rotate so that the wire pressing wheel 4 on the swing arm 3 is pressed against the wire feeding wheel 2; the swing arm elastic element 9 is used to drive the swing arm 3 to rotate so that the wire pressing wheel 4 on the swing arm 3 is separated from the wire feeding wheel 2.

[0057] The embroidery thread of the embroidery machine is located between the thread feeding wheel 2 and the thread pressing wheel 4. The embroidery thread first passes between the thread feeding wheel 2 and the thread pressing wheel 4 (the embroidery thread can be pressed between the thread feeding wheel 2 and the thread pressing wheel 4), and then passes through the corresponding embroidery needle.

[0058] The specific use of the elastic pressing type active thread feeding device for an embroidery machine of this embodiment is as follows. The working process of a certain embroidery needle of the embroidery machine is described as an example.

[0059] The embroidery needle of the embroidery machine includes a working state and a non-working state. When the embroidery needle is in the working state, the swing arm driving mechanism 6 is connected to the swing arm 3 through the elastic abutment element 7 and drives the swing arm 3 to rotate, so that the thread pressing wheel 4 on the swing arm 3 is pressed against the thread feeding wheel 2, thereby pressing the embroidery thread corresponding to the embroidery needle between the thread feeding wheel 2 and the thread pressing wheel 4; specifically, during the extension of the driving rod 6.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 6, the abutment piece 7.1 of the elastic abutment element 7 is driven to abut against the swing arm 3, thereby driving the swing arm 3 to rotate, so that the corresponding thread pressing wheel 4 is pressed against the surface of the thread feeding wheel 2; then, through The thread feeding drive mechanism 5 drives the thread feeding wheel 2 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 wheel 2. The length of the embroidery thread output once 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 stitch 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.

[0060] When the embroidery needle is in a non-working state, the driving rod 6.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 6 contracts. During this process, the swing arm 3 rotates under the action of the swing arm elastic element 9 to separate the thread pressing wheel 4 from the thread feeding wheel 2. Thereafter, when the thread feeding driving mechanism 5 drives the thread feeding wheel 2 to rotate, the embroidery thread corresponding to the thread pressing wheel 4 is not output (the thread pressing wheel 4 is separated from the thread feeding wheel 2, and the embroidery thread between them will not be output by the rotating thread feeding wheel 2).

[0061] The elastic pressure-type active thread feeding device for an embroidery machine of the present embodiment 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. The device can well adapt to the use requirements of current multi-station embroidery machines and the production rhythm of current multi-station embroidery machines.

[0062] On the other hand, in the elastic pressure-type active thread feeding device for an embroidery machine of the present embodiment, during the process in which the swing arm driving mechanism 6 drives the swing arm 3 to rotate through the elastic abutment element 7 so that the thread pressing wheel 4 is pressed against the thread feeding wheel 2, the elastic deformation of the elastic supporting element 7.2 can be used to compensate for the gap between the swing arm 3 and the thread pressing wheel 4 caused by manufacturing errors or looseness during long-term use, so that the thread pressing wheel 4 can be stably and reliably pressed against the thread feeding wheel 2, thereby ensuring the stability of the thread feeding.

[0063] At the same time, since the swing arm driving mechanism 6 is connected to the swing arm 3 by the elastic abutment element 7 to drive the swing arm 3 to rotate, the swing arm driving mechanism 6 can be directly fixed to the bracket 1 by bolts, rivets or welding, which is convenient for the installation of the swing arm driving mechanism 6; at the same time, it can avoid the rigid collision between the swing arm driving mechanism 6 and the swing arm 3, thereby reducing noise and avoiding the problem of deformation of the swing arm 3 and the swing arm driving mechanism 6 due to rigid collision.

[0064] Specifically, Figure 1 , Figure 2 , Figure 3 As shown, the abutment member 7.1 is slidably disposed on the driving rod 6.1. The sliding direction of the abutment member 7.1 is parallel to the telescopic direction of the driving rod 6.1. The elastic support element 7.2 provides elastic force to make the abutment member 7.1 slide toward the swing arm 3.

[0065] A guide hole 10 extending along the axial direction of the driving rod 6.1 is provided at one end of the driving rod 6.1 facing the swing arm 3. The axial direction of the driving rod 6.1 is consistent with the telescopic direction of the driving rod 6.1. The abutment 7.1 is slidably arranged in the guide hole 10. The elastic support element 7.2 is a spring or an elastic sheet, and the spring can be a tension spring or a compression spring. In this embodiment, the elastic support element 7.2 is a compression spring. The elastic support element 7.2 is located between the bottom surface of the guide hole 10 and the abutment 7.1. In this way, it is ensured that the abutment 7.1 can be stably slidably connected to the driving rod 6.1, and the elastic support element 7.2 can be stably installed on the driving rod 6.1.

[0066] The end of the driving rod 6.1 facing the swing arm 3 is provided with a detachably connected guide sleeve 8. In the present embodiment, the guide sleeve 8 is connected to the end of the driving rod 6.1 by a thread. Of course, the guide sleeve 8 can also be fixed to the end of the driving rod 6.1 by bolt locking. The guide sleeve 8 is coaxial or parallel to the driving rod 6.1. In the present embodiment, the guide sleeve 8 is coaxial with the driving rod 6.1. The inner hole of the guide sleeve 8 constitutes the guide hole 10, and the end face of the driving rod 6.1 constitutes the bottom face of the guide hole 10. In this way, before the guide sleeve 8 is installed on the driving rod 6.1, the elastic abutment element 7 can be first installed in the guide sleeve 8, and then the guide sleeve 8 can be installed on the end of the driving rod 6.1 facing the swing arm 3, thereby realizing the installation of the elastic abutment element 7, and then facilitating the installation and replacement of the elastic abutment element 7.

[0067] A stopper 11 is provided on the inner wall of the guide hole 10, and the stopper 11 is located at one end of the guide sleeve 8 away from the driving rod 6.1. A stopper 7.3 cooperating with the stopper is provided on the abutment member 7.1, and the stopper 7.3 abuts against the stopper under the action of the elastic supporting element 7.2. In the present embodiment, the abutment member 7.1 is an abutment rod. The stopper is provided at one end of the abutment rod, and the other end of the abutment rod extends outward from the guide hole 10. In the process of extending the driving rod 6.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 6, the other end of the abutment rod of the elastic abutment element 7 is driven to abut against the swing arm 3, thereby driving the swing arm 3 to rotate, so that the corresponding wire pressing wheel 4 is pressed against the surface of the wire feeding wheel 2. At the same time. In this process, the elastic deformation of the spring or elastic sheet constituting the elastic support element 7.2 can be used to compensate for the gap between the swing arm 3 and the wire pressing wheel 4 due to manufacturing errors or looseness during long-term use, so that the wire pressing wheel 4 can be stably and reliably pressed on the wire feeding wheel 2, thereby ensuring the stability of wire feeding.

[0068] In this embodiment, Figure 1 , Figure 2 As shown, the swing arm 3 is located above the wire feeding wheel 2, and the swing arm driving mechanism 6 is arranged below the swing arm 3. The swing arm driving mechanism 6 and the wire pressing wheel 4 are located on opposite sides of the rotating shaft of the swing arm 3.

[0069] Of course, it should be noted that the swing arm driving mechanism 6 can also be arranged above the swing arm 3. The swing arm driving mechanism 6 and the crimping wheel 4 can also be located on the same side of the rotating shaft of the swing arm 3.

[0070] In one implementation of this embodiment, the wire feeding drive mechanism 5 is a rotary motor 5.1, and the rotating shaft of the rotary motor 5.1 is directly connected to the rotating shaft of the wire feeding wheel 2.

[0071] like Figure 1 As shown, in another implementation of this embodiment, the wire feeding drive mechanism 5 includes a rotating motor 5.1 and a transmission mechanism 5.2. The transmission mechanism connects the rotating shaft of the rotating motor 5.1 and the rotating shaft of the wire feeding wheel 2, and the rotating motor 5.1 drives the wire feeding wheel 2 to rotate through the transmission mechanism. The transmission mechanism is a pulley transmission mechanism, a sprocket transmission mechanism, a gear transmission mechanism, or a friction wheel transmission mechanism.

[0072] Specific embodiment 2: The rest of the structure of this embodiment refers to the specific embodiment 1, except that:

[0073] In this embodiment, the elastic pressing type active thread feeding device for an embroidery machine does not need to be provided with a swing arm elastic element 9, and the swing arm elastic element 9 in the first embodiment can be omitted. Specifically,

[0074] The swing arm 3 is located below the wire feeding wheel 2 (not shown in the figure). The "center of gravity of the assembly consisting of the swing arm 3 and the wire pressing wheel 4 on the swing arm 3" and the "wire pressing wheel 4 on the swing arm 3" are located on the same side of the rotating shaft of the swing arm 3. The swing arm driving mechanism 6 drives the swing arm 3 to rotate through the abutment member 7.1 so that the wire pressing wheel 4 on the swing arm 3 is pressed against the wire feeding wheel 2.

[0075] When the driving rod 6.1 of the air cylinder, oil cylinder, electric cylinder, electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 6 is extended, the abutment member 7.1 of the elastic abutment element 7 is driven to abut against the swing arm 3, thereby driving the swing arm 3 to rotate, so that the corresponding pressing wheel 4 is pressed against the surface of the wire feeding wheel 2. When the driving rod 6.1 of the air cylinder, oil cylinder, electric cylinder, electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 6 is contracted, the swing arm 3 will rotate downward under the deadweight of the pressing wheel 4, so that the pressing wheel 4 rotates downward and separates from the wire feeding wheel 2, so that the corresponding embroidery thread is not actively output. In this way, the swing arm elastic element 9 in the first embodiment can be omitted.

[0076] Of course, it should be noted that in the process of contraction of the driving rod 6.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 6, in order to further improve the separation efficiency of the wire crimping wheel 4 and the wire feeding wheel 2 and ensure the separation of the wire crimping wheel 4 and the wire feeding wheel 2, the swing arm elastic element 9 in the specific embodiment one can also be arranged in this embodiment to improve the separation efficiency of the wire crimping wheel 4 and the wire feeding wheel 2 and ensure the separation of the wire crimping wheel 4 and the wire feeding wheel 2.

[0077] Specific embodiment 3: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, and the difference is that:

[0078] In this embodiment, the bracket 1 is directly fixed to the needle bar frame of the embroidery machine. For example, the bracket 1 is fixed to the needle bar frame by bolts, rivets or welding. The wire feeding drive mechanism 5 and the swing arm drive mechanism 6 are both arranged on the bracket 1. In this way, the bracket 1 can move synchronously with the needle bar frame, so that an elastic pressure-type active wire feeding device for an embroidery machine moves synchronously with the needle bar frame, and there will be no displacement between the wire feeding wheel 2 on the bracket 1 and the needle bar frame. In this way, when the embroidery machine changes colors and the needle bar frame moves, the embroidery thread pressed between the wire feeding wheel 2 and the pressure wheel will not be pulled, thereby further improving the accuracy of the embroidery thread length output by the drive device each time, thereby improving the quality of the embroidery product.

[0079] Specific embodiment 4: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, the difference is that:

[0080] In this embodiment, the bracket 1 is fixed to the frame of the embroidery machine. For example, the bracket 1 is fixed to the frame of the embroidery machine by bolts, riveting or welding. The wire feeding drive mechanism 5 and the swing arm drive mechanism 6 can be arranged on the bracket 1 or on the frame of the embroidery machine as needed. In this way, the arrangement and installation of an elastic pressing type active wire feeding device for an embroidery machine can be facilitated.

[0081] Specific embodiment 5: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, and the difference is that:

[0082] An elastic pressure-type active thread feeding device for an embroidery machine also includes a bracket 1 translation mechanism. The bracket 1 is slidably arranged on the frame of the embroidery machine, and the moving direction of the bracket 1 is parallel to the moving direction of the needle bar frame of the embroidery machine. Specifically, a translation track is also arranged on the frame of the embroidery machine, and the translation track is parallel to the moving direction of the needle bar frame, and the bracket 1 translates along the translation track. The thread feeding drive mechanism 5 and the swing arm drive mechanism 6 are both arranged on the bracket 1. The bracket 1 translation mechanism drives the bracket 1 to translate. The rotating shaft of the thread feeding wheel 2 is parallel to the sliding direction of the bracket 1.

[0083] The translation mechanism of the bracket 1 is an electric cylinder or an electric push rod or a linear module. In this embodiment, the translation mechanism of the bracket 1 includes a translation motor, a screw rod and a nut matched with the screw rod. The screw rod is rotatably arranged on the frame of the embroidery machine, and the screw rod is parallel to the translation track. The translation motor drives the screw rod to rotate. The nut is connected to the bracket 1 through a connecting piece. In this way, the bracket 1 can be driven by the translation drive mechanism to move synchronously with the needle bar frame. Of course, it should be noted that the translation drive mechanism can also be other translation drive mechanisms on the market.

[0084] 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 elastic pressing type active thread feeding device for an embroidery machine, characterized in that: include: Bracket; A wire feeding wheel is rotatably arranged on a bracket; A wire feeding drive mechanism drives the wire feeding wheel to rotate; A swing arm is rotatably arranged on the bracket, and a wire pressing wheel cooperating with the wire feeding wheel is arranged on the swing arm; The swing arm driving mechanism and the elastic abutment element, the elastic abutment element includes an abutment piece that can be abutted and connected with the swing arm and an elastic supporting element that supports the abutment piece, the swing arm driving mechanism drives the swing arm to rotate through the elastic abutment element, so that the wire pressing wheel on the swing arm is pressed against the wire feeding wheel or separated from the wire feeding wheel; The embroidery thread of the embroidery machine first passes between the thread feed wheel and the thread pressure wheel, and then passes through the embroidery needle.

2. The elastic pressing type active thread feeding device for an embroidery machine according to claim 1, characterized in that: The swing arm driving mechanism comprises a telescopic driving rod, the abutment member is slidably arranged on the driving rod, and the sliding direction of the abutment member is parallel to the telescopic direction of the driving rod.

3. The elastic pressing type active thread feeding device for an embroidery machine according to claim 2, characterized in that: A guide hole extending along the axial direction of the driving rod is provided at one end of the driving rod facing the swing arm, the abutment is slidably arranged in the guide hole, and the elastic supporting element is located between the bottom surface of the guide hole and the abutment.

4. The elastic pressing type active thread feeding device for embroidery machine according to claim 3, characterized in that: The end of the driving rod facing the swing arm is provided with a detachably connected guide sleeve, which is coaxial or parallel to the driving rod. The inner hole of the guide sleeve constitutes the guide hole, and the end surface of the driving rod constitutes the bottom surface of the guide hole.

5. The elastic pressing type active thread feeding device for embroidery machine according to claim 3 or 4, characterized in that: A stopper is arranged on the inner wall of the guide hole, and a limiting block cooperating with the stopper is arranged on the abutting piece. The limiting block abuts against the stopper under the action of the elastic supporting element.

6. The elastic pressing type active thread feeding device for embroidery machine according to claim 2, 3 or 4, characterized in that: The swing arm driving mechanism is an air cylinder or an oil cylinder or an electric cylinder or an electric push rod or a push-pull electromagnet, and the telescopic rod in the air cylinder or the oil cylinder or the electric cylinder or the electric push rod or the push-pull electromagnet constitutes the driving rod.

7. The elastic pressing type active thread feeding device for embroidery machine according to claim 1, 2, 3 or 4, characterized in that: The elastic supporting element is a spring or an elastic sheet.

8. The elastic pressing type active thread feeding device for an embroidery machine according to claim 1, characterized in that: The swing arm driving mechanism includes a telescopic driving rod, which is an air cylinder, an oil cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet. The telescopic rod in the air cylinder, the oil cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constitutes the driving rod, and the elastic abutment element is arranged on the end of the driving rod.

9. The elastic pressing type active thread feeding device for embroidery machine according to claim 1, 2, 3 or 4, characterized in that: It also includes a swing arm elastic element. One of the swing arm driving mechanism and the swing arm elastic element drives the swing arm to rotate so that the wire pressing wheel is pressed against the wire feeding wheel; the other drives the swing arm to rotate so that the wire pressing wheel is separated from the surface of the wire feeding wheel.

10. The elastic pressing type active thread feeding device for embroidery machine according to claim 1, 2, 3 or 4, characterized in that: The swing arm is located below the wire feeding wheel, and the center of gravity of the assembly composed of the swing arm and the wire pressing wheel on the swing arm is located on the same side of the rotating shaft of the swing arm as the wire pressing wheel on the swing arm; the swing arm driving mechanism drives the swing arm to rotate through the abutment so that the wire pressing wheel on the swing arm is pressed against the wire feeding wheel.

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