An online detection device for thread tension of an embroidery machine and an embroidery machine

Abstract

The utility model discloses a kind of thread tension on-line detection device and embroidery machine for embroidery machine, to provide a kind of thread tension on-line detection device and embroidery machine for embroidery machine, which can be embroidered in process, the thread tension of embroidery thread is measured accurately in real time, to provide support for accurately controlling the thread tension of embroidery thread.It includes: setting on the force measuring element of head, including two parallel force measuring shafts, embroidery thread on the head in turn passes two force measuring shafts;Sensor, measure the force of embroidery thread acting on the two force measuring shafts of force measuring element;Thread tension zeroing device, including driving executive mechanism and thread loosening element, driving executive mechanism drives thread loosening element to move between two force measuring shafts to push the embroidery thread between two force measuring shafts, so that the embroidery thread tensioned on two force measuring shafts is relaxed.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, specifically to an online thread tension detection device for embroidery machines and an embroidery machine. Background Technology

[0002] During the embroidery process, the tension of the embroidery thread needs to be maintained within a suitable range. The thread tension cannot be too high or too low, otherwise it will directly affect the quality of the embroidery. Currently, embroidery machines use a thread tensioner to adjust the thread tension. The thread tensioner is generally located on the needle bar frame of the machine head (each machine head includes one needle bar frame) and moves synchronously with the needle bar frame. The embroidery thread first passes through the thread tensioner and then through the needle.

[0003] Traditional embroidery machines use manually adjustable knob-type thread tensioners. By manually rotating the knob, the tension of the thread is adjusted. This manual adjustment relies on operator intervention, resulting in low efficiency, inconsistent thread tension, and compromised embroidery quality. For example, Chinese Patent Publication No. CN117051545A, entitled "Embroidery Machine Thread Gripper with Quick Threading and Adjustable Tension," describes a thread gripper that uses manual adjustment of the thread tension.

[0004] To address the problems with manually adjustable knob-type thread tensioners, some embroidery machines now employ automatic thread tensioners that adjust the thread tension, thus automatically regulating the thread tension. However, current embroidery machines, whether using manually adjustable knob-type or automatically adjustable thread tensioners, cannot directly and accurately measure the thread tension during the embroidery process, and therefore cannot make adjustments based on the actual thread tension during embroidery. Utility Model Content

[0005] The purpose of this invention is to provide an online tension detection device and embroidery machine for embroidery machines that can accurately measure the tension of the embroidery thread in real time during the embroidery process, thus providing support for accurate control of the thread tension.

[0006] The technical solution of this utility model is:

[0007] An online thread tension detection device for an embroidery machine, installed on the machine head, includes:

[0008] The force measuring component set on the machine head includes two parallel force measuring shafts, and the embroidery thread on the machine head passes around the two force measuring shafts in sequence.

[0009] The sensor measures the force exerted by the embroidery thread on the two force-measuring axes of the force-measuring component;

[0010] The thread tension zeroing device includes a drive actuator and a thread loosening component. The drive actuator drives the thread loosening component to move between two force-measuring shafts, thereby pushing the embroidery thread between the two force-measuring shafts to loosen the thread tensioned on the two force-measuring shafts. The specific operation of an online thread tension detection device for an embroidery machine according to this solution is described below, taking the working process of a specific embroidery needle on the machine head as an example.

[0011] When the embroidery needle is in the embroidery process (when the embroidery needle is working, the other embroidery needles on the machine head where the embroidery needle is located are not working), the embroidery thread corresponding to the embroidery needle will be in a taut state and taut on two force measuring shafts. Thus, the force of the embroidery thread acting on the two force measuring shafts of the force measuring component is measured in real time and accurately by the sensor (this force is the thread tension of the embroidery thread during the embroidery process).

[0012] When the embroidery needle stops working, the thread clamp at the bottom of the needle bar frame of the machine head first clamps the embroidery thread corresponding to the embroidery needle, and then cuts the embroidery thread corresponding to the embroidery needle; then, the drive actuator of the thread tension zeroing device drives the loosening component to move between the two force measuring shafts to push the embroidery thread between the two force measuring shafts, so that the embroidery thread in the tensioned state is pulled out. Then the drive actuator drives the loosening component to move back to reset, so that each embroidery thread is in a relaxed state, and the embroidery thread tensioned on the two force measuring shafts is relaxed. At this time, the force of the embroidery thread acting on the two force measuring shafts is zeroed. In this way, when another needle is used for embroidery, the thread corresponding to that needle will be tensioned again and stretched on the two force measuring shafts. The sensor can then accurately measure the force exerted by the thread on the two force measuring shafts in real time (this force is the thread tension during the embroidery process). Thus, during the operation of the embroidery machine, only the thread corresponding to the needle being used is tensioned on the two force measuring shafts. The sensor measures the tension of only one thread at a time during the operation of the embroidery process, thereby ensuring accurate measurement of the thread tension during the embroidery process and providing support for accurate control of the thread tension.

[0013] Preferably, the two force-measuring shafts are distributed along the front-to-back direction of the embroidery machine, extending along the direction of each embroidery thread arrangement on the machine head. This facilitates the actual arrangement of the two force-measuring shafts, improves structural compactness, and reduces the space occupied by the force-measuring components in the front-to-back direction of the embroidery machine.

[0014] Preferably, the thread loosening component is a thread loosening rod, which is parallel to the force measuring shaft and located above the embroidery thread between the two force measuring shafts. The drive actuator drives the thread loosening component to move up and down. This facilitates the actual arrangement of the thread loosening rod, improves structural compactness, and reduces the space occupied by the thread loosening rod in the front-to-back direction of the embroidery machine.

[0015] Preferably, the thread loosening component is a thread loosening rod, which is parallel to the force measuring shaft and located below the embroidery thread between the two force measuring shafts. The drive actuator moves the thread loosening component up and down. This facilitates the actual arrangement of the thread loosening rod, improves structural compactness, and reduces the space occupied by the thread loosening rod in the front-to-back direction of the embroidery machine.

[0016] Preferably, the drive actuator is located on the machine head, and the drive actuator is an electric cylinder, a pneumatic cylinder, an electric push rod, a push-pull electromagnet, or a linear module.

[0017] Preferably, the force measuring component also includes a support, with two force measuring shafts mounted on the support. The support is located on the machine head, and the sensor is positioned between the machine head and the support. This facilitates the actual installation of the force measuring component.

[0018] Preferably, the support has several sets of thread holes arranged sequentially along the winding shaft. Each set of thread holes corresponds one-to-one with the embroidery thread on the machine head. The thread hole sets are located above the two force-measuring shafts, and each set of thread holes includes a strip-shaped thread-feeding hole and a guide wire hole. In this way, the embroidery thread can be passed through the strip-shaped thread-feeding hole and the guide wire hole on the support, and the stitch of the embroidery thread can be adjusted.

[0019] Preferably, a mounting base is also included, on which the force measuring component, sensor, and thread tension zeroing device are all mounted, and the mounting base is fixed to the machine head. This solution mounts the force measuring component, sensor, and thread tension zeroing device all on the mounting base. Thus, the online thread tension detection device for embroidery machines can be manufactured independently and then mounted on the machine head via the mounting base, facilitating the actual processing, manufacturing, and installation of the online thread tension detection device for embroidery machines.

[0020] Preferably, the force measuring element is located below the thread take-up lever on the machine head. The embroidery thread is wound from top to bottom to the bottom of one of the force measuring shafts, then to the bottom of the other force measuring shaft, then extends upwards through the thread take-up lever, and finally downwards through the embroidery needle on the machine head. This facilitates the actual arrangement of the force measuring element and helps to achieve minimal changes to the structure of the existing embroidery machine.

[0021] An embroidery machine, including an online thread tension detection device for the embroidery machine.

[0022] The beneficial effect of this utility model is that it can accurately measure the tension of the embroidery thread in real time during the embroidery process, providing support for accurate control of the thread tension. Attached Figure Description

[0023] Figure 1 This is a partial side view of an online tension detection device for embroidery machines according to this utility model.

[0024] Figure 2 This is a three-dimensional structural schematic diagram of an online tension detection device for embroidery machines according to the present invention.

[0025] Figure 3 This is a three-dimensional structural diagram of an online tension detection device for embroidery machines according to the present invention in practical application.

[0026] Figure 4 This is another three-dimensional structural schematic diagram of the online tension detection device for embroidery machines according to this utility model in practical application.

[0027] In the picture:

[0028] Machine head 1, needle bar holder 1.1;

[0029] Force measuring component 2, force measuring shaft 2.1, support 2.2, wire hole group 2.3, strip wire hole 2.31, wire hole 2.32;

[0030] Sensor 3;

[0031] Line tension zeroing device 4, line loosening component 4.1, drive actuator 4.2, vertical guide rod 4.3, lifting component 4.4;

[0032] Mounting bracket 5;

[0033] Embroidery thread 6;

[0034] 7. Line pick-up lever. Detailed Implementation

[0035] Specific Implementation Example 1, such as Figures 1-4 As shown, an online thread tension detection device for an embroidery machine is installed on the machine head 1 of the embroidery machine. In practical applications, one online thread tension detection device corresponds to one machine head 1 on the embroidery machine. In this embodiment, each machine head 1 on the embroidery machine corresponds to one online thread tension detection device, that is, there is a one-to-one correspondence between the machine head 1 and the online thread tension detection device. Of course, in practical applications, the online thread tension detection device of this embodiment can also be applied to some machine heads 1 in the embroidery machine as needed.

[0036] An online tension detection device for embroidery machines includes a force measuring element 2, a sensor 3, and a tension zeroing device 4.

[0037] Force measuring element 2 is mounted on the machine head 1. Force measuring element 2 includes two parallel force measuring shafts 2.1. The force measuring shafts 2.1 extend along the direction of the embroidery threads 6 on the machine head 1; in this embodiment, the force measuring shafts 2.1 are horizontally distributed. The embroidery threads 6 on the machine head 1 pass over the two force measuring shafts 2.1 sequentially. In this embodiment, each embroidery thread 6 on the machine head 1 where the force measuring element 2 is located passes over the two force measuring shafts 2.1 sequentially (i.e., each embroidery thread 6 on the machine head 1 where the force measuring element 2 is located passes over the two force measuring shafts 2.1 sequentially). Of course, in practical applications, only a portion of the embroidery threads 6 on the machine head 1 may pass over the two force measuring shafts 2.1 sequentially.

[0038] Sensor 3 is mounted on the head 1 of the embroidery machine. Sensor 3 is a force sensor. Sensor 3 measures the force exerted by the embroidery thread 6 on the two force-measuring shafts 2.1 of the force-measuring component 2.

[0039] A thread tension zeroing device 4 is mounted on the head 1 of the embroidery machine. The thread tension zeroing device 4 includes a drive actuator 4.2 and a thread loosening component 4.1. The drive actuator 4.2 drives the thread loosening component 4.1 to move between two force-measuring shafts 2.1, pushing the embroidery thread 6 between the two force-measuring shafts 2.1 to loosen the embroidery thread 6 tensioned on the two force-measuring shafts 2.1. The drive actuator 4.2 is mounted on the head 1 of the embroidery machine. In this embodiment, the drive actuator 4.2 is an electric cylinder, a pneumatic cylinder, an electric push rod, a push-pull electromagnet, or a linear module. The drive actuator 4.2 can also be other drive actuators 4.2 in the prior art, such as a screw drive mechanism, a rack and pinion drive mechanism, a pulley drive mechanism, etc.

[0040] The specific operation of the online thread tension detection device for an embroidery machine according to this embodiment is described below, taking the working process of a certain embroidery needle on the machine head 1 as an example.

[0041] like Figure 1 , Figure 2 As shown, when the embroidery needle is in the embroidery process (when the embroidery needle is working, the other embroidery needles on the machine head 1 where the embroidery needle is located are not working), the embroidery thread 6 corresponding to the embroidery needle will be in a taut state and taut on the two force measuring shafts 2.1. Thus, the force of the embroidery thread 6 acting on the two force measuring shafts 2.1 of the force measuring component 2 can be accurately measured in real time by the sensor 3 (this force is the thread tension of the embroidery thread 6 during the embroidery process).

[0042] When the embroidery needle stops working, the thread clamp at the bottom of the needle bar frame of the machine head 1 first clamps the embroidery thread 6 corresponding to the embroidery needle, and then cuts the embroidery thread 6 corresponding to the embroidery needle.

[0043] Next, as Figure 3As shown, the drive actuator 4.2 of the thread tension zeroing device 4 drives the loosening component 4.1 to move between the two force measuring shafts 2.1 to push the embroidery thread 6 between the two force measuring shafts 2.1, so that the embroidery thread 6 in the tensioned state is pulled out.

[0044] Then, as Figure 4 As shown, the drive actuator 4.2 drives the thread loosening component 4.1 to return to its original position, thereby relaxing each embroidery thread 6 and loosening the tension on the two force measuring shafts 2.1. At this time, the force exerted by the embroidery thread 6 on the two force measuring shafts 2.1 is zeroed. Thus, when another needle is used for embroidery, the embroidery thread 6 corresponding to that needle will be tensioned again and remain tensioned on the two force measuring shafts 2.1. The sensor 3 can then accurately measure the force exerted by the embroidery thread 6 on the two force measuring shafts 2.1 in real time (this force is the thread tension of the embroidery thread 6 during the embroidery process). In this way, during the operation of the embroidery machine, only the embroidery thread 6 corresponding to the needle being used is tensioned on the two force measuring shafts 2.1. The sensor 3 measures the tension of only one embroidery thread 6 at a time during its operation, thus ensuring accurate measurement of the thread tension of the embroidery thread 6 during the embroidery process and providing support for accurate control of the thread tension of the embroidery thread 6.

[0045] Specifically, such as Figures 1-4 As shown, an online thread tension detection device for an embroidery machine further includes a mounting base 5. The mounting base 5 is fixedly mounted on the head 1 of the embroidery machine by bolts, rivets, or welding. In this embodiment, the mounting base 5 is fixedly mounted on the needle bar frame 1.1 of the head 1 of the embroidery machine by bolts, rivets, or welding, so that the mounting base 5 can move synchronously with the needle bar frame.

[0046] Of course, in practical applications, the mounting base 5 can also be fixed to the thread clamping seat (not shown in the figure) on the machine head 1 by bolts, rivets, or welding. The thread clamping seat on the machine head 1 is located above the needle bar frame of the machine head 1. The thread clamping seat is used to install the thread clamping device (such as a manually adjustable knob thread clamping device or an automatically adjustable automatic thread clamping device) for adjusting the tension of the embroidery thread 6. The thread clamping seat is fixedly installed on the needle bar frame or on the frame of the embroidery machine.

[0047] In an online thread tension detection device for an embroidery machine, the force measuring component 2, sensor 3, and thread tension zeroing device 4 are all mounted on a mounting base 5. This design allows the online thread tension detection device for the embroidery machine to be manufactured independently and then installed onto the machine head 1 via the mounting base 5, thus facilitating the actual processing, manufacturing, and installation of the online thread tension detection device for the embroidery machine.

[0048] Furthermore, such as Figure 1 , Figure 2As shown, the force measuring component 2 also includes a support 2.2. The support 2.2 is mounted on the machine head 1. The sensor 3 is positioned between the machine head 1 and the support 2.2. In this embodiment, the support 2.2 is mounted on the mounting base 5, and the sensor 3 is positioned between the machine head 1 and the support 2.2. Two force measuring shafts 2.1 are fixedly mounted on the support 2.2. This facilitates the actual installation of the force measuring component 2.

[0049] In one example, the force sensor is mounted on the mounting base 5, and the support 2.2 is mounted on the force sensor.

[0050] Furthermore, such as Figure 1 , Figure 2 , Figure 4 As shown, the force measuring element 2 is located below the thread take-up lever 7 on the machine head 1. The embroidery thread 6 is wound from top to bottom to the bottom of one of the force measuring shafts 2.1, then to the bottom of the other force measuring shaft 2.1, then extends upwards through the thread take-up lever 7, and then downwards through the embroidery needle on the machine head 1. This facilitates the actual arrangement of the force measuring element 2 and helps to achieve minimal changes to the structure of the existing embroidery machine.

[0051] Specifically, such as Figure 1 , Figure 2 , Figure 4 As shown, the support 2.2 has several thread hole groups 2.3 arranged sequentially along the winding shaft. Each thread hole group 2.3 corresponds one-to-one with the embroidery thread 6 on the machine head 1 (i.e., the thread hole groups on the support 2.2 correspond one-to-one with each embroidery thread 6 on the machine head 1 where the support 2.2 is located). The thread hole groups 2.3 are located above the two force measuring shafts 2.1. Each thread hole group 2.3 includes a strip-shaped thread-giving hole 2.31 and a guide hole 2.32. The embroidery thread 6 passes through the strip-shaped thread-giving hole from top to bottom, then winds down to the bottom of one of the force measuring shafts 2.1, then winds down to the bottom of the other force measuring shaft 2.1, then winds up through the strip-shaped thread-giving hole. Next, the embroidery thread 6 extends upwards through the take-up lever 7, then winds downwards through the guide hole, and finally passes through the embroidery needle on the machine head 1. In this way, the embroidery thread 6 can be passed through the strip-shaped thread-giving hole and the guide hole on the support 2.2, and the stitch of the embroidery thread 6 can be adjusted.

[0052] Of course, in practical applications, the force measuring element 2 can also be arranged above the line-lifting rod 7 as needed.

[0053] Furthermore, such as Figures 1-4 As shown, the two force-measuring shafts 2.1 of the force-measuring component 2 are distributed along the front-back direction of the embroidery machine. This facilitates the actual arrangement of the two force-measuring shafts 2.1, improves structural compactness, and reduces the space occupied by the force-measuring component 2 in the front-back direction of the embroidery machine.

[0054] In this embodiment, the two force-measuring shafts 2.1 are located at the same height. Of course, it should be noted that the two force-measuring shafts 2.1 may also have a height difference.

[0055] In this second specific embodiment, the remaining structure is the same as in the first specific embodiment, except that...

[0056] like Figures 1-4 As shown, the slack rod 4.1 is a slack rod, which is parallel to the force measuring shaft 2.1.

[0057] In one implementation, such as Figure 1 As shown, the thread loosening lever is located above the two force-measuring shafts 2.1. The thread loosening lever is positioned above the embroidery thread 6 between the two force-measuring shafts 2.1. The drive actuator 4.2 drives the thread loosening component 4.1 to move up and down. This facilitates the actual arrangement of the thread loosening lever, improves structural compactness, and reduces the space occupied by the thread loosening lever in the front-to-back direction of the embroidery machine.

[0058] In this embodiment, when the embroidery needle stops working, the thread clamp at the bottom of the needle bar frame of the machine head 1 first clamps the embroidery thread 6 corresponding to the embroidery needle, and then cuts the embroidery thread 6 corresponding to the embroidery needle; then, as... Figure 3 As shown, the drive actuator 4.2 drives the thread loosening component 4.1 to move downwards, and the thread loosening lever pushes the embroidery thread 6 between the two force measuring shafts 2.1 downwards, causing the embroidery thread 6, which is in a taut state, to be pulled out; then, as... Figure 4 As shown, the drive actuator 4.2 drives the loosening rod to move upward and reset, thereby slackening each embroidery thread 6 and loosening the embroidery thread 6 tensioned on the two force measuring shafts 2.1. At this time, the force of the embroidery thread 6 acting on the two force measuring shafts 2.1 is cleared to zero.

[0059] In another embodiment, the loosening rod is located below the two force-measuring shafts 2.1. The loosening rod is located below the embroidery thread 6 between the two force-measuring shafts 2.1 (not shown in the figure). The drive actuator 4.2 drives the loosening component 4.1 to move up and down. This facilitates the actual arrangement of the loosening rod and helps to improve the structural compactness, reducing the space occupied by the loosening rod in the front-back direction of the embroidery machine.

[0060] In this embodiment, when the embroidery needle stops working, the thread clamp at the bottom of the needle bar frame of the machine head 1 first clamps the embroidery thread 6 corresponding to the embroidery needle, and then cuts the embroidery thread 6 corresponding to the embroidery needle; then, the drive actuator 4.2 drives the thread loosening component 4.1 to move upward, and the thread loosening rod pushes the embroidery thread 6 between the two force measuring shafts 2.1 upward, so that the embroidery thread 6 in the tensioned state is pulled out. Then, the drive actuator 4.2 drives the thread loosening rod to move downward back to reset, so that each embroidery thread 6 is in a relaxed state, and the embroidery thread 6 tensioned on the two force measuring shafts 2.1 is relaxed. At this time, the force of the embroidery thread 6 acting on the two force measuring shafts 2.1 is cleared to zero.

[0061] In this embodiment, as Figures 2-4As shown, the tension clearing device 4 also includes a vertical guide rod 4.3 and a lifting member 4.4 that slides along the vertical guide rod 4.3. The vertical guide rod 4.3 is fixed on the mounting base 5. The loosening member 4.1 is fixedly connected to the lifting member 4.4. The drive actuator 4.2 is mounted on the mounting base 5, and the drive actuator 4.2 drives the lifting member 4.4, thereby causing the loosening member 4.1 to move up and down.

[0062] It should be noted that the loosening component 4.1 can also be driven directly by the drive actuator 4.2. For example, the loosening component 4.1 can be directly fixed to the telescopic rod of the electric cylinder, pneumatic cylinder, electric push rod, or push-pull electromagnet that constitutes the drive actuator 4.2. The drive actuator 4.2 can directly drive the loosening component 4.1 to move up and down or move, thereby eliminating the need for the vertical guide rod 4.3 and the lifting component 4.4 and reducing manufacturing costs.

[0063] Specific embodiment three: An embroidery machine, including an online thread tension detection device for the embroidery machine. The specific structure of the online thread tension detection device for the embroidery machine is described in specific embodiment one or specific embodiment two.

[0064] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An online thread tension detection device for an embroidery machine, mounted on the head of the embroidery machine, characterized in that, include: The force measuring component set on the machine head includes two parallel force measuring shafts, and the embroidery thread on the machine head passes around the two force measuring shafts in sequence. The sensor measures the force exerted by the embroidery thread on the two force-measuring axes of the force-measuring component; The thread tension zeroing device includes a drive actuator and a thread loosening component. The drive actuator drives the thread loosening component to move between two force measuring shafts to push the embroidery thread between the two force measuring shafts, so as to loosen the embroidery thread that is taut on the two force measuring shafts.

2. The online tension detection device for embroidery machines according to claim 1, characterized in that, The two force measuring shafts are distributed along the front-to-back direction of the embroidery machine, and extend along the direction of the embroidery thread arrangement on the machine head.

3. The online tension detection device for embroidery machines according to claim 2, characterized in that, The loosening component is a loosening rod, which is parallel to the force measuring shaft and located above the embroidery thread between the two force measuring shafts. The drive actuator drives the loosening component to move up and down.

4. The online tension detection device for embroidery machines according to claim 2, characterized in that, The loosening component is a loosening rod, which is parallel to the force measuring shaft and located below the embroidery thread between the two force measuring shafts. The drive actuator drives the loosening component to move up and down.

5. The online tension detection device for embroidery machines according to claim 1, 2, 3, or 4, characterized in that, The drive actuator is located on the machine head and can be an electric cylinder, a pneumatic cylinder, an electric push rod, a push-pull electromagnet, or a linear module.

6. The online thread tension detection device for an embroidery machine according to claim 1, 2, 3, or 4, characterized in that, The force measuring component also includes a support, with two force measuring shafts mounted on the support. The support is located on the machine head, and the sensor is located between the machine head and the support.

7. The online tension detection device for embroidery machines according to claim 6, characterized in that, The support is provided with several groups of thread holes distributed sequentially along the winding shaft. Each group of thread holes corresponds to the embroidery thread on the machine head. The group of thread holes is located above the two force measuring shafts. Each group of thread holes includes a strip-shaped thread hole and a wire hole.

8. The online thread tension detection device for an embroidery machine according to claim 1, 2, 3, or 4, characterized in that, It also includes a mounting base, on which the force measuring element, sensor and line tension zeroing device are all mounted, and the mounting base is fixed to the machine head.

9. The online thread tension detection device for an embroidery machine according to claim 1, 2, 3, or 4, characterized in that, The force measuring component is located below the thread take-up lever on the machine head. The embroidery thread is wound from top to bottom to the bottom of one of the force measuring shafts, then to the bottom of the other force measuring shaft, then extends upward through the thread take-up lever, and then downward through the embroidery needle on the machine head.

10. An embroidery machine, characterized in that, The invention includes an online tension detection device for embroidery machines as described in any one of claims 1-9.

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