Thread feeding device and embroidery machine

Abstract

The utility model discloses a thread feeding device and an embroidery machine, and aims to provide the thread feeding device and the embroidery machine which adopt an active thread feeding mode, actively provide embroidery threads for each needle in the embroidery process so as to improve the quality of embroidery products and meet the use requirements of the current multi-station embroidery machine. The wire feeding device comprises a wire feeding unit and a wire feeding driving mechanism, the wire feeding wheel is rotationally arranged on the support, and the wire feeding driving mechanism drives the wire feeding wheel to rotate; the at least one swing arm is rotationally arranged on the bracket, and a line pressing wheel is arranged on the swing arm; the swing arm driving mechanisms are in one-to-one correspondence with the swing arms, each swing arm driving mechanism comprises an abutting part, the abutting parts can be connected with the corresponding swing arms in an abutting mode, and the swing arm driving mechanisms drive the corresponding swing arms to rotate through the abutting parts so that the wire pressing wheels on the corresponding swing arms 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 thread feeding of embroidery machines, in particular to a thread feeding device and an 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 a thread feeding device and an embroidery machine which adopt 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 meet the use requirements of current multi-station embroidery machines.

[0007] The technical solution of the utility model is:

[0008] A thread feeding device, applied to an embroidery machine, comprises a thread feeding unit and a thread feeding driving mechanism, wherein the thread feeding unit comprises:

[0009] Bracket;

[0010] The wire feeding wheel is rotatably arranged on the bracket, and the wire feeding driving mechanism drives the wire feeding wheel to rotate;

[0011] At least one swing arm, the swing arm is rotatably arranged on the bracket, and a wire pressing wheel is arranged on the swing arm;

[0012] A swing arm driving mechanism corresponding to each swing arm, the swing arm driving mechanism comprising an abutment portion, the abutment portion can be abutted and connected with the corresponding swing arm, and the swing arm driving mechanism drives the corresponding swing arm to rotate through the abutment portion, so that the wire pressing wheel on the corresponding swing arm is pressed against the wire feeding wheel or separated from the wire feeding wheel;

[0013] 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 a thread feeding device of this scheme is as follows. The following takes the working process of an embroidery needle of the head of the embroidery machine as an example to describe.

[0014] 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 drives the corresponding swing arm to rotate through the abutment part, so that the thread pressing wheel on the corresponding 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.

[0015] At the same time, a thread feeding device 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.

[0016] On the other hand, since the swing arm driving mechanism includes an abutment portion, the abutment portion can be abutted and connected with the corresponding swing arm, and the swing arm driving mechanism drives the corresponding swing arm to rotate through the abutment portion, so that the wire pressing wheel on the corresponding swing arm is pressed against the wire feeding wheel or separated from the wire feeding wheel; in this way, the swing arm driving mechanism can be directly fixed to the bracket or the frame of the embroidery machine by bolts, rivets or welding, which facilitates the installation of the swing arm driving mechanism.

[0017] Preferably, an elastic member is further included, and one of the swing arm driving mechanism and the elastic member 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 elastic member 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.

[0018] Preferably, the swing arm is located below the wire feeding wheel, and the center of gravity of the assembly formed by 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 corresponding swing arm to rotate through the abutment portion, so that the wire pressing wheel on the corresponding swing arm is pressed against the wire feeding wheel. The arrangement of this scheme can omit the elastic member in the wire feeding unit, so that the swing arm rotates downward under the deadweight of the wire pressing wheel, and then the wire pressing wheel rotates downward and separates from the wire feeding wheel.

[0019] 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 of the pneumatic cylinder, the hydraulic cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constituting the swing arm driving mechanism faces the swing arm, and one end of the telescopic rod facing the swing arm constitutes the abutment portion. 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.

[0020] Preferably, the swing arm driving mechanism comprises an eccentric wheel that can be connected to the swing arm and a swing arm motor that drives the eccentric wheel to rotate, and the outer peripheral surface of the eccentric wheel constitutes the abutment portion. The swing arm motor drives the eccentric wheel to rotate, and the eccentric wheel abuts against the swing arm, thereby driving the swing arm to rotate, so that the corresponding wire pressing wheel is pressed against the surface of the wire feeding wheel.

[0021] Preferably, the surface of the abutting portion abutting against the swing arm is an arc surface or a spherical surface. In this way, when the abutting portion abuts against the swing arm and drives the swing arm to rotate, the friction between the abutting portion and the swing arm is reduced, which is conducive to the swing arm driving mechanism to smoothly drive the swing arm to rotate.

[0022] Preferably, the swing arm driving mechanism is fixed on a support or a frame of an embroidery machine, so as to facilitate the installation of the swing arm driving mechanism.

[0023] Preferably, there are multiple wire feeding units, the wire feeding wheels of each wire feeding unit are coaxially distributed, the rotating shafts of the wire feeding wheels of each wire feeding unit are connected as one, and each wire feeding unit shares a wire feeding drive mechanism. In this way, only one wire feeding drive mechanism is needed to drive the wire feeding wheels of each wire feeding unit to rotate synchronously, which can effectively reduce the number of rotating drive mechanisms and further reduce the manufacturing cost.

[0024] Preferably, there are multiple wire feeding units, each of which corresponds to a wire feeding drive mechanism, and the wire feeding drive mechanism drives the wire feeding wheel of the corresponding wire feeding unit to rotate, so as to facilitate the independent layout and application of each wire feeding unit and the rotation drive mechanism.

[0025] Preferably, the wire feeding unit further comprises a wire structure, the wire structure comprises a wire groove located above the wire feeding wheel, the wire groove corresponds to the swing arm one by one, the wire groove is V-shaped, and the embroidery thread passes through the wire groove from top to bottom. In this way, the embroidery thread can be guided and limited by the wire groove to ensure that the embroidery thread passes between the wire feeding wheel and the wire pressing wheel. In addition, when the V-shaped wire groove structure is used to limit the embroidery thread, the embroidery thread can enter the bottom of the wire groove through the notch of the wire groove, which facilitates the cooperation between the embroidery thread and the wire groove.

[0026] Preferably, the wire structure further includes a wire hole, which corresponds to the swing arm one by one, and is located below the wire feeding wheel, through which the embroidery thread passes from top to bottom. The wire hole cooperates with the wire groove to guide and limit the embroidery thread, ensuring that the embroidery thread passes between the wire feeding wheel and the wire pressing wheel.

[0027] Preferably, the bracket of the wire feeding unit is directly fixed on the needle bar frame of the embroidery machine, and the wire feeding drive mechanism and the swing arm drive mechanism are arranged on the bracket. In this way, the bracket can move synchronously with the needle bar frame, and there will be no displacement between the wire feeding wheel on the bracket 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 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. On the other hand, there is no need to arrange an additional power mechanism to drive the bracket to move synchronously with the needle bar frame, which can further reduce the production cost.

[0028] Preferably, the bracket is fixed on the frame of the embroidery machine, so that the arrangement and installation of the thread feeding unit can be facilitated.

[0029] As a preference, the device further comprises a support translation mechanism, wherein the support is slidably arranged on the frame of the embroidery machine, the thread feeding drive mechanism and the swing arm drive mechanism are arranged on the support, the support translation mechanism drives the support to translate, and the moving direction of the support is parallel to the moving direction of the needle bar frame of the embroidery machine. In this way, the position of the support can be arranged according to actual needs, and then the support is driven by the support translation mechanism to move synchronously with the needle bar frame.

[0030] An embroidery machine comprises a thread feeding device.

[0031] The beneficial effects of the utility model are:

[0032] 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.

[0033] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional partial structural schematic diagram of a wire feeding device of the utility model from a certain viewing angle.

[0035] Figure 2 It is a three-dimensional partial structural schematic diagram of a wire feeding device of the utility model from another perspective.

[0036] Figure 3 It is a partial front view of a wire feeding device of the utility model.

[0037] Figure 4 It is a partial structural schematic diagram of a specific embodiment 3 of a wire feeding device of the utility model.

[0038] Figure 5 It is a partial structural schematic diagram of a specific embodiment 5 of a wire feeding device of the utility model.

[0039] In the figure:

[0040] Swing arm driving mechanism 1, abutment portion 1.0, telescopic rod 1.1;

[0041] Wire feeding unit 2, bracket 2.1, wire feeding wheel 2.2, swing arm 2.3, wire pressing wheel 2.4, wire groove 2.5, wire hole 2.6;

[0042] Embroidery thread 3;

[0043] Needle bar frame 4;

[0044] Translation track 5;

[0045] Support translation mechanism 6. DETAILED DESCRIPTION

[0046] Specific embodiment 1, as Figure 1 , Figure 2 , Figure 3 As shown, a wire feeding device includes a wire feeding unit 2 and a wire feeding driving mechanism. A wire feeding device is applied to an embroidery machine. The embroidery machine includes a frame and a plurality of machine heads. Each machine head includes a needle bar frame 4. The needle bar frame 4 moves along the guide rails of the embroidery machine, and the guide rails are 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 4 to move along the guide rails. The needle bar frame 4 and the needle bar frame driving mechanism are both prior arts, so this application does not elaborate on conventional technical means such as the specific method and structure of the needle bar frame 4 and the needle bar frame driving mechanism.

[0047] The wire feeding unit 2 comprises a bracket 2.1, a wire feeding wheel 2.2, an elastic member, at least one swing arm 2.3 and a swing arm driving mechanism 1.

[0048] The wire feeding wheel 2.2 is rotatably arranged on the bracket 2.1. The wire feeding driving mechanism drives the wire feeding wheel 2.2 to rotate. In this embodiment, the axial direction of the wire feeding wheel 2.2 is parallel to the moving direction of the needle bar frame 4. The wire feeding driving mechanism includes a rotary motor.

[0049] The swing arm 2.3 is rotatably arranged on the bracket 2.1. There are one or more swing arms 2.3. In this embodiment, there are multiple swing arms 2.3, and each swing arm 2.3 is sequentially distributed along the axial direction of the wire feeding wheel 2.2. The rotating shaft of the swing arm 2.3 is parallel to the rotating shaft of the wire feeding wheel 2.2. In this embodiment, each swing arm 2.3 shares a rotating shaft. Of course, it should be noted that each swing arm 2.3 can also be rotatably arranged on the bracket 2.1 through an independent rotating shaft.

[0050] A wire pressing wheel 2.4 is provided on the swing arm 2.3. The wire pressing wheel 2.4 is rotatably arranged on the swing arm 2.3. The rotating shaft of the wire pressing wheel 2.4 is parallel to the rotating shaft of the wire feeding wheel 2.2. In this embodiment, the wire pressing wheel 2.4 is distributed on the front side of the wire feeding wheel 2.2. Of course, it should be noted that the wire pressing wheel 2.4 can also be distributed on the rear side of the wire feeding wheel 2.2.

[0051] Each swing arm 2.3 corresponds to one elastic member or multiple elastic members (elastic members are not shown in the figure). In this embodiment, the swing arm 2.3 corresponds to the elastic member one by one. The elastic member provides elastic force to drive the swing arm 2.3 to rotate. The elastic member connects the swing arm 2.3 and the bracket 2.1. The elastic member is a torsion spring, a tension spring, a compression spring, an elastic sheet, or a rubber band.

[0052] The swing arm driving mechanism 1 corresponds to the swing arm 2.3 one by one. The swing arm driving mechanism 1 is directly fixed to the bracket 2.1 or the frame of the embroidery machine by bolts, rivets or welding. The swing arm driving mechanism 1 includes an abutment portion 1.0. The abutment portion 1.0 can be abutted and connected with the corresponding swing arm 2.3. The swing arm driving mechanism 1 drives the corresponding swing arm 2.3 to rotate through the abutment portion 1.0, so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is pressed against the wire feeding wheel 2.2 or separated from the wire feeding wheel 2.2; specifically, in this embodiment, one of the swing arm driving mechanism 1 and the elastic member drives the swing arm 2.3 to rotate so that the wire pressing wheel 2.4 is pressed against the wire feeding wheel 2.2; the other drives the swing arm 2.3 to rotate so that the wire pressing wheel 2.4 is separated from the surface of the wire feeding wheel 2.2. For example, the swing arm driving mechanism 1 is used to drive the corresponding swing arm 2.3 to rotate so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is pressed against the wire feeding wheel 2.2; the elastic member is used to drive the corresponding swing arm 2.3 to rotate so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is separated from the wire feeding wheel 2.2.

[0053] In one implementation of the present embodiment, the swing arm driving mechanism 1 is an air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet. The telescopic rod 1.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 1 faces the swing arm 2.3, and one end of the telescopic rod 1.1 facing the swing arm 2.3 constitutes the abutment portion 1.0. In this implementation, the surface of the abutment portion 1.0 that abuts against the swing arm 2.3 is an arc surface or a spherical surface. When the telescopic rod 1.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 1 is extended, the abutment portion 1.0 of the telescopic rod 1.1 abuts against the swing arm 2.3, thereby driving the swing arm 2.3 to rotate, so that the corresponding wire pressing wheel 2.4 is pressed against the surface of the wire feeding wheel 2.2. When the telescopic rod 1.1 of the air cylinder, oil cylinder, electric cylinder, electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 1 is contracted, the swing arm 2.3 is driven to rotate under the action of the elastic member, so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is separated from the wire feeding wheel 2.2.

[0054] In another implementation of the present embodiment, the swing arm driving mechanism 1 includes an eccentric wheel that can be connected to the swing arm 2.3 and a swing arm motor (not shown in the figure) that drives the eccentric wheel to rotate. The outer peripheral surface of the eccentric wheel constitutes the abutment portion 1.0. In this implementation, the abutment portion 1.0 is an arc surface, that is, a cylindrical surface. When the swing arm motor drives the eccentric wheel to rotate forward, the outer peripheral surface of the eccentric wheel abuts against the swing arm 2.3, thereby driving the swing arm 2.3 to rotate, so that the corresponding wire pressing wheel 2.4 is pressed against the surface of the wire feeding wheel 2.2. When the swing arm motor drives the eccentric wheel to rotate in the opposite direction, the swing arm 2.3 is driven to rotate under the action of the elastic member, so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is separated from the wire feeding wheel 2.2.

[0055] Of course, it should be noted that the swing arm driving mechanism 1 can also be other swing arm driving mechanisms 1 on the market.

[0056] There are one or more wire feeding units 2, and each wire feeding unit 2 corresponds to a machine head. In this embodiment, the wire feeding unit 2 corresponds to the machine head of the embroidery machine one by one. Of course, it should be noted that in actual application, the wire feeding unit 2 of this embodiment can also be applied to a part of the machine heads of the embroidery machine.

[0057] In this embodiment, the swing arm 2.3 in the same thread feeding unit 2 corresponds one-to-one to the embroidery needle on the needle bar frame 4 of the corresponding machine head, and the thread pressing wheel 2.4 in the same thread feeding unit 2 corresponds one-to-one to the embroidery needle on the needle bar frame 4 of the corresponding machine head.

[0058] The embroidery thread 3 of the embroidery machine is located between the corresponding thread feeding wheel 2.2 and the thread pressing wheel 2.4 (an embroidery thread 3 is arranged between each thread feeding wheel 2.2 and the thread pressing wheel 2.4), and the embroidery thread 3 first passes between the thread feeding wheel 2.2 and the thread pressing wheel 2.4 (the embroidery thread 3 can be pressed between the thread feeding wheel 2.2 and the thread pressing wheel 2.4), and then passes through the corresponding embroidery needle.

[0059] The specific operation of the thread feeding device of this embodiment is as follows (among the embroidery needles on the same needle bar frame 4 of the embroidery machine, when one of the embroidery needles is working, the other embroidery needles are not working). The following description takes the working process of a certain embroidery needle on the head of the embroidery machine as an example.

[0060] 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 1 drives the corresponding swing arm 2.3 to rotate through the abutment portion 1.0, so that the thread pressing wheel 2.4 on the corresponding swing arm 2.3 is pressed tightly against the thread feeding wheel 2.2, thereby pressing the embroidery thread 3 corresponding to the embroidery needle between the thread feeding wheel 2.2 and the thread pressing wheel 2.4; then, the thread feeding driving mechanism drives the thread feeding wheel 2.2 to rotate, actively outputs the embroidery thread 3, and controls the output of the embroidery thread 3 each time by the rotation angle of the thread feeding wheel 2.2. The length of the embroidery thread 3 output at one 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 3 with a length consistent with the stitch length for each stitch in the embroidery process, so that the embroidery thread 3 will not pull the fabric, and ensure that the embroidery thread 3 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 adjustment of the tightness of the embroidery thread 3, and inability to ensure the quality of the embroidery in the prior art.

[0061] When the embroidery needle is in a non-working state, the telescopic rod 1.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 1 contracts, or the swing arm motor constituting the swing arm driving mechanism 1 drives the eccentric wheel to rotate in the opposite direction. At this time, the swing arm 2.3 rotates under the action of the elastic member to separate the thread pressing wheel 2.4 from the thread feeding wheel 2.2. Thereafter, during the process of the thread feeding drive mechanism driving the thread feeding wheel 2.2 to rotate, the embroidery thread 3 corresponding to the thread pressing wheel 2.4 is not output (the thread pressing wheel 2.4 is separated from the thread feeding wheel 2.2, and the embroidery thread 3 between them will not be output by the rotating thread feeding wheel 2.2).

[0062] At the same time, a thread feeding device of the present invention adopts an active thread feeding method to actively provide embroidery thread 3 for each stitch in the embroidery process, so there is no need to manually adjust the tightness of the embroidery thread 3. 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.

[0063] On the other hand, since the swing arm driving mechanism 1 includes the abutment portion 1.0, the abutment portion 1.0 can be abutted and connected with the corresponding swing arm 2.3, and the swing arm driving mechanism 1 drives the corresponding swing arm 2.3 to rotate through the abutment portion 1.0, so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is pressed against the wire feeding wheel 2.2 or separated from the wire feeding wheel 2.2; in this way, the swing arm driving mechanism 1 can be directly fixed to the bracket 2.1 or the frame of the embroidery machine by bolts, rivets or welding, which is convenient for the installation of the swing arm driving mechanism 1.

[0064] In this embodiment, Figure 1 , Figure 2 As shown, the swing arm 2.3 is located above the wire feeding wheel 2.2, and the swing arm driving mechanism 1 is arranged below the swing arm 2.3. The swing arm driving mechanism 1 and the wire pressing wheel 2.4 are located on opposite sides of the rotating shaft of the swing arm 2.3.

[0065] Of course, it should be noted that the swing arm driving mechanism 1 can also be arranged above the swing arm 2.3. The swing arm driving mechanism 1 and the crimping wheel 2.4 are located on the same side of the rotating shaft of the swing arm 2.3.

[0066] In one implementation of this embodiment, the wire feeding drive mechanism is a rotary motor, and the rotating shaft of the rotary motor is directly connected to the rotating shaft of the wire feeding wheel.

[0067] In another implementation of this embodiment, the wire feeding drive mechanism includes a rotating motor and a wire feeding transmission mechanism. The wire feeding transmission mechanism connects the rotating shaft of the rotating motor and the rotating shaft of the wire feeding wheel, and the rotating motor drives the wire feeding wheel to rotate through the wire feeding transmission mechanism. The wire feeding transmission mechanism is a pulley transmission mechanism, a sprocket transmission mechanism, a gear transmission mechanism, or a friction wheel transmission mechanism.

[0068] Specific embodiment 2: The rest of the structure of this embodiment refers to the specific embodiment 1, except that:

[0069] In this embodiment, no elastic member is required in the wire feeding unit 2, and the elastic member in the wire feeding unit 2 can be omitted. Specifically,

[0070] The swing arm 2.3 is located below the wire feeding wheel 2.2 (not shown in the figure). The "center of gravity of the assembly consisting of the swing arm 2.3 and the wire pressing wheel 2.4 on the swing arm 2.3" and the "wire pressing wheel 2.4 on the swing arm 2.3" are located on the same side of the rotating shaft of the swing arm 2.3. The swing arm driving mechanism 1 drives the corresponding swing arm 2.3 to rotate through the abutment portion 1.0, so that the wire pressing wheel 2.4 on the corresponding swing arm 2.3 is pressed against the wire feeding wheel 2.2.

[0071] When the telescopic rod 1.1 of the air cylinder, oil cylinder, electric cylinder, electric push rod or push-pull electromagnet constituting the swing arm driving mechanism 1 is contracted, or when the swing arm motor drives the eccentric wheel to rotate in the opposite direction, the swing arm 2.3 will rotate downward under the deadweight of the thread pressing wheel 2.4, so that the thread pressing wheel 2.4 rotates downward and separates from the thread feeding wheel 2.2, so that the corresponding embroidery thread 3 is not actively output. In this way, the elastic member in the thread feeding unit 2 can be omitted.

[0072] Of course, it should be noted that in the process of contraction of the telescopic rod 1.1 of the air cylinder or oil cylinder or electric cylinder or electric push rod or push-pull electromagnet constituting the swing arm drive mechanism 1, or in the process of the swing arm motor driving the eccentric wheel to rotate in the opposite direction, in order to further improve the separation efficiency of the wire pressing wheel 2.4 and the wire feeding wheel 2.2 and ensure that the wire pressing wheel 2.4 and the wire feeding wheel 2.2 are separated, the elastic member in the specific embodiment one can also be arranged in this embodiment to improve the separation efficiency of the wire pressing wheel 2.4 and the wire feeding wheel 2.2 and ensure that the wire pressing wheel 2.4 and the wire feeding wheel 2.2 are separated.

[0073] 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:

[0074] like Figure 4 As shown, the bracket 2.1 of the wire feeding unit 2 is directly fixed on the corresponding needle bar frame 4, and the wire feeding drive mechanism and the swing arm drive mechanism 1 are both arranged on the bracket 2.1. For example, the bracket 2.1 is fixed to the needle bar frame 4 by bolts, riveting or welding. In this way, the bracket 2.1 can move synchronously with the needle bar frame 4, and there will be no displacement between the wire feeding wheel 2.2 on the bracket 2.1 and the needle bar frame 4. In this way, when the embroidery machine changes colors and the needle bar frame 4 moves, the embroidery thread 3 pressed between the wire feeding wheel 2.2 and the pressure wheel will not be pulled, thereby further improving the accuracy of the length of the embroidery thread 3 output by the drive device each time, thereby improving the quality of the embroidery product. On the other hand, there is no need to arrange an additional power mechanism to drive the bracket 2.1 to move synchronously with the needle bar frame 4, which can further reduce the production cost.

[0075] Specific embodiment 4: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, the difference is that:

[0076] In this embodiment, the bracket 2.1 of the wire feeding unit 2 is fixed to the frame of the embroidery machine. For example, the bracket 2.1 is fixed to the frame of the embroidery machine by bolts, riveting or welding. In this way, the arrangement and installation of the wire feeding unit 2 can be facilitated. The wire driving mechanism and the swing arm driving mechanism 1 can be arranged on the bracket 2.1 or the frame as needed.

[0077] 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:

[0078] like Figure 5 As shown, a wire feeding device further includes a bracket translation mechanism 6. The bracket 2.1 is slidably arranged on the frame of the embroidery machine, and the moving direction of the bracket 2.1 is parallel to the moving direction of the needle bar frame 4 of the embroidery machine. Specifically, a translation track 5 is also arranged on the frame of the embroidery machine, and the translation track 5 is parallel to the moving direction of the needle bar frame 4, and the bracket 2.1 translates along the translation track 5. The wire feeding drive mechanism and the swing arm drive mechanism 1 are both arranged on the bracket 2.1. The bracket translation mechanism 6 drives the bracket 2.1 to translate.

[0079] The bracket translation mechanism 6 is an electric cylinder or an electric push rod or a linear module. In this embodiment, the bracket translation mechanism 6 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 2.1 through a connecting piece. In this way, the bracket 2.1 can be driven by the translation drive mechanism to move synchronously with the needle bar frame 4. Of course, it should be noted that the translation drive mechanism can also be other translation drive mechanisms on the market.

[0080] In this embodiment, there are multiple wire feeding units 2. The brackets 2.1 of each wire feeding unit 2 are connected as a whole through a connecting piece. The brackets 2.1 of each wire feeding unit 2 are driven by a common bracket translation mechanism 6.

[0081] Specific embodiment 6: The rest of the structure of this embodiment refers to any one of the specific embodiments from specific embodiment 1 to specific embodiment 5, and the difference is that:

[0082] like Figure 1 , Figure 2 , Figure 3As shown, the wire feeding unit 2 also includes a wire structure. The wire structure includes a wire groove 2.5 located above the wire feeding wheel 2.2. The wire groove 2.5 corresponds one-to-one to the swing arm 2.3. The wire groove 2.5 corresponds one-to-one to the swing arm 2.3. The wire groove 2.5 is V-shaped, and the embroidery thread 3 passes through the wire groove 2.5 from top to bottom. In this way, the embroidery thread 3 can be guided and limited by the wire groove 2.5 to ensure that the embroidery thread 3 passes between the wire feeding wheel 2.2 and the wire pressing wheel 2.4. In addition, when the V-shaped wire groove 2.5 structure is used to limit the embroidery thread 3, the embroidery thread 3 can enter the bottom of the wire groove 2.5 through the notch of the wire groove 2.5, which facilitates the cooperation between the embroidery thread 3 and the wire groove 2.5.

[0083] The wire structure also includes a wire hole 2.6. The wire hole 2.6 corresponds to the swing arm 2.3. The wire hole 2.6 is located below the wire feeding wheel 2.2, and the embroidery thread 3 passes through the wire hole 2.6 from top to bottom. The wire hole 2.6 cooperates with the wire groove 2.5 to guide and limit the embroidery thread 3, ensuring that the embroidery thread 3 passes between the wire feeding wheel 2.2 and the wire pressing wheel 2.4.

[0084] The swing arm drive mechanism 1 is arranged at the rear side of the bracket 2.1. In this solution, the swing arm drive mechanism 1 is shielded at the rear side of the bracket 2.1, which is beneficial to improving the appearance effect on the one hand, and can also prevent operators or other objects from contacting the swing arm drive mechanism 1 on the other hand. Of course, it should be noted that the swing arm drive mechanism 1 can also be arranged at the front side of the bracket 2.1 as needed.

[0085] In this embodiment, there are multiple wire feeding units 2.

[0086] In one implementation of this embodiment, the wire feeding wheels 2.2 of each wire feeding unit 2 are coaxially distributed, the rotating shafts of the wire feeding wheels 2.2 of each wire feeding unit 2 are connected as one, and each wire feeding unit 2 shares a wire feeding drive mechanism. In this way, only one wire feeding drive mechanism is needed to drive the wire feeding wheels 2.2 of each wire feeding unit 2 to rotate synchronously, which can effectively reduce the number of wire feeding drive mechanisms and further reduce the manufacturing cost.

[0087] In another implementation of this embodiment, the wire feeding unit 2 corresponds to the wire feeding drive mechanism one by one, and the wire feeding drive mechanism drives the wire feeding wheel 2.2 of the corresponding wire feeding unit 2 to rotate. In this way, it is convenient for each wire feeding unit 2 and the wire feeding drive mechanism to be independently arranged and applied.

[0088] Specific embodiment 7, an embroidery machine, comprising a thread feeding device. The specific structure of the thread feeding device refers to any one of the specific embodiments from specific embodiment 1 to specific embodiment 6.

[0089] 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. A thread feeding device, used in an embroidery machine, characterized in that: It comprises a wire feeding unit (2) and a wire feeding drive mechanism, wherein the wire feeding unit comprises: Bracket (2.1); A wire feeding wheel (2.2) is rotatably arranged on the bracket (2.1), and a wire feeding drive mechanism drives the wire feeding wheel (2.2) to rotate; At least one swing arm (2.3), the swing arm being rotatably mounted on the bracket, and a wire pressing wheel (2.4) being provided on the swing arm; A swing arm driving mechanism (1) corresponding to each swing arm, the swing arm driving mechanism comprising an abutment portion (1.0), the abutment portion being abuttable and connected to a corresponding swing arm (2.3), the swing arm driving mechanism (1) driving the corresponding swing arm to rotate via the abutment portion, so that a wire pressing wheel (2.4) on the corresponding swing arm is pressed against the wire feeding wheel or is separated from the wire feeding wheel; The embroidery thread (3) of the embroidery machine first passes between the thread feed wheel and the thread pressure wheel, and then passes through the embroidery needle.

2. A wire feeding device according to claim 1, characterized in that: It also comprises an elastic member, wherein one of the swing arm driving mechanism (1) and the elastic member drives the swing arm (2.3) to rotate so that the wire pressing wheel (2.4) is pressed against the wire feeding wheel (2.2); and the other driving swing arm (2.3) rotates so that the wire pressing wheel (2.4) is separated from the surface of the wire feeding wheel (2.2).

3. A wire feeding device according to claim 1, characterized in that: The swing arm (2.3) is located below the wire feeding wheel (2.2); the center of gravity of the assembly formed by the swing arm and the wire pressing wheel on the swing arm and the wire pressing wheel on the swing arm are located on the same side of the rotating shaft of the swing arm; the swing arm driving mechanism (1) drives the corresponding swing arm to rotate via the abutment portion (1.0), so that the wire pressing wheel on the corresponding swing arm is pressed against the wire feeding wheel.

4. A wire feeding device according to claim 1, 2 or 3, characterized in that: The swing arm drive mechanism (1) is an air cylinder, an oil cylinder, an electric cylinder, an electric push rod, or a push-pull electromagnet. The telescopic rod (1.1) of the air cylinder, the oil cylinder, the electric cylinder, the electric push rod, or the push-pull electromagnet constituting the swing arm drive mechanism faces the swing arm, and one end of the telescopic rod (1.1) facing the swing arm constitutes the abutment portion (1.0).

5. A wire feeding device according to claim 1, 2 or 3, characterized in that: The swing arm driving mechanism comprises an eccentric wheel which can be connected with the swing arm and a swing arm motor which drives the eccentric wheel to rotate. The outer peripheral surface of the eccentric wheel constitutes the abutment portion.

6. A wire feeding device according to claim 1, 2 or 3, characterized in that: The surface of the abutting portion (1.0) that abuts against the swing arm (2.3) is an arc surface or a spherical surface.

7. A wire feeding device according to claim 1, 2 or 3, characterized in that: The swing arm driving mechanism (1) is fixed on a bracket or a frame of an embroidery machine.

8. A wire feeding device according to claim 1, 2 or 3, characterized in that: There are a plurality of wire feeding units (2), the wire feeding wheels (2.2) of each wire feeding unit (2) are coaxially distributed, the rotating shafts of the wire feeding wheels (2.2) of each wire feeding unit (2) are connected as one, and each wire feeding unit (2) shares a wire feeding drive mechanism.

9. A wire feeding device according to claim 1, 2 or 3, characterized in that: There are a plurality of wire feeding units (2), and the wire feeding units (2) correspond to the wire feeding drive mechanisms one by one, and the wire feeding drive mechanisms drive the wire feeding wheels (2.2) of the corresponding wire feeding units (2) to rotate.

10. A wire feeding device according to claim 1, 2 or 3, characterized in that: The wire feeding unit further comprises a wire structure, which comprises a wire groove (2.5) located above the wire feeding wheel, the wire groove (2.5) corresponding to the swing arm (2.3) one by one, the wire groove (2.5) being in a V shape, and the embroidery thread (3) passing through the wire groove from top to bottom.

11. A wire feeding device according to claim 10, characterized in that: The wire structure further comprises a wire hole (2.6), the wire hole corresponding to the swing arm (2.3) one by one, the wire hole (2.6) being located below the wire feeding wheel, and the embroidery thread (3) passing through the wire hole from top to bottom.

12. A wire feeding device according to claim 1, 2 or 3, characterized in that: The bracket (2.1) of the thread feeding unit (2) is directly fixed on the needle bar frame (4) of the embroidery machine, and the thread feeding drive mechanism and the swing arm drive mechanism are arranged on the bracket.

13. A wire feeding device according to claim 1, 2 or 3, characterized in that: The bracket (2.1) is fixed on the frame of the embroidery machine.

14. A wire feeding device according to claim 1, 2 or 3, characterized in that: It also includes a bracket translation mechanism (6), the bracket (2.1) is slidably arranged on the frame of the embroidery machine, the thread feeding drive mechanism and the swing arm drive mechanism are arranged on the bracket, the bracket translation mechanism (6) drives the bracket (2.1) to translate, and the moving direction of the bracket is parallel to the moving direction of the needle bar frame (4) of the embroidery machine.

15. An embroidery machine, characterized in that: A wire feeding device comprising any one of claims 1-14.

Images