Automatic original point finding structure of automatic bottom thread changing device of embroidery machine

Abstract

The utility model discloses an automatic origin finding structure of an automatic bottom thread changing device of an embroidery machine, at least two automatic bottom thread changing devices move along a transverse guide mechanism, the transverse guide mechanism is provided with an original point position corresponding to each automatic bottom thread changing device, and a working origin detecting component is arranged between each automatic bottom thread changing device and the corresponding original point position. The detection device is used for detecting whether the automatic bottom line changing device runs to a corresponding original point. When the automatic bottom line changing device is shut down, powered off and restarted accidentally, the device can move nearby along the transverse guide mechanism in a short distance to find a working original point, and if the working original point detection assembly detects a corresponding original point position, the working original point can be found.

Description

Technical field

[0001] The utility model belongs to the technical field of embroidery equipment, and particularly relates to an automatic bobbin thread changing device for an embroidery machine. [Background Technology]

[0002] Currently available automatic bobbin changing devices achieve this by automatically replacing the bobbin case and bobbin core. Chinese invention patent application publication number CN110340628A discloses a multi-station robotic arm bobbin case changing device capable of changing bobbin cases at several pre-set stations. The device comprises a horizontal guide mechanism and a bobbin case changing device. The bobbin case changing device includes a translating base. The horizontal guide mechanism includes a horizontal guide rail positioned below the shuttle case of the embroidery machine. The horizontal guide rail extends along the line connecting the shuttle cases, and the translating base is slidably connected to the horizontal guide rail.

[0003] Embroidery machines typically have different numbers of bobbin case changers depending on the number of heads. Currently, there's typically one bobbin case changer for every ten heads. Once the entire machine's bobbin thread is replaced, all the bobbin case changers move along a horizontal guide mechanism to one end of the machine, waiting for the worker to replace the empty bobbin material storage tray with a pre-wound one. Once the replacement is complete, the reset button is manually pressed to reset each bobbin case changer to its initial position, ready for the next job. This completes the machine's automatic bobbin thread replacement function.

[0004] When multiple bobbin case changing devices are installed, if all the bobbin case changing devices are moved along the lateral guide mechanism to one end of the embroidery machine but not yet in place, and if an unexpected shutdown or power outage occurs during this process, the bobbin case changing devices may not be able to find their home position when restarting, causing chaotic operation and machine crashes. Similarly, if all the bobbin case changing devices are moved along the guide rail to one end of the embroidery machine and in place, but a busy worker fails to replace the material storage tray in time, causing a shutdown or power outage, chaotic operation and machine crashes may occur when restarting the machine. In these situations, to restore the automatic bobbin changer to normal operation, the machine must be powered off, and the automatic bobbin changer must be manually pushed to its initial position for each device to change the bobbin, and then powered on to re-position it before operation can resume. This is not intelligent, increases worker workload, and is prone to errors. [Utility Model Content]

[0005] In view of the deficiencies in the existing technology, the technical problem to be solved by the present invention is to provide an automatic origin-finding structure for the automatic bobbin thread changing device of an embroidery machine, so as to avoid the situation where the automatic bobbin thread changing device cannot find the origin after the machine is turned on in the event of an unexpected shutdown or power outage.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The automatic bobbin changing device of the embroidery machine automatically finds the origin structure, at least two automatic bobbin changing devices move along the transverse guide mechanism, the transverse guide mechanism is provided with an origin position corresponding to each automatic bobbin changing device, and a working origin detection component is provided between the automatic bobbin changing device and the corresponding origin position, which is used to detect whether the automatic bobbin changing device has run to the corresponding origin position.

[0008] Preferably, the automatic bobbin thread changing device is provided with a distance measuring sensor for measuring the lateral distance between two adjacent automatic bobbin thread changing devices.

[0009] Preferably, the working origin detection component includes a working origin sensor provided on the automatic bottom thread changing device and an origin position addressing baffle provided corresponding to the origin position of each automatic bottom thread changing device. The working origin sensor and the origin position addressing baffle cooperate to detect whether the automatic bottom thread changing device has run to the corresponding origin position.

[0010] Preferably, the origin position addressing baffle is mounted on a baffle mounting seat, the transverse guide mechanism includes a transverse slide groove extending in the transverse direction, and the baffle mounting seat is mounted on the transverse slide groove.

[0011] Preferably, the origin position addressing baffle is an L-shaped structure, including a horizontal side and a vertical side extending vertically upward from one end of the horizontal side. The rear end of the horizontal side is fixed to the baffle mounting seat, and the working origin sensor is provided with a U-shaped groove opening downward, and the vertical side passes through the U-shaped groove during operation.

[0012] Preferably, the distance measuring sensor is an infrared distance measuring sensor; or, the distance measuring sensor is a proximity switch.

[0013] Preferably, the transverse guide mechanism is provided with a material tray replacement position corresponding to the replacement storage tray position of each automatic bottom line changing device and a material tray replacement position sensor is provided corresponding to the replacement material tray position, and the replacement material tray position of the first automatic bottom line changing device in the transverse direction coincides with the origin position.

[0014] Preferably, the transverse guide mechanism is provided with an automatic positioning structure corresponding to the origin position of the first automatic bottom thread changing device in the transverse direction.

[0015] Preferably, the transverse guide mechanism includes a transverse rack, the automatic bottom thread changing device is provided with a drive motor and a drive gear, the transverse rack is engaged with the drive gear, and the drive motor drives the drive gear to rotate.

[0016] Preferably, the transverse guiding mechanism includes a transverse guide rail, and the automatic bottom thread changing device is provided with a transverse slider that is slidably engaged with the transverse guide rail.

[0017] The utility model adopts the above technical solution and has the following technical effects: when the automatic bottom thread changing device is accidentally shut down or powered off, after it is restarted, it can move a short distance along the horizontal guide mechanism to find the working origin. If the working origin detection component detects the corresponding origin position, the working origin is found.

[0018] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0019] The utility model is further described below with reference to the accompanying drawings:

[0020] Figure 1 This is a partial structural diagram of a multi-station automatic bottom thread changing device;

[0021] Figure 2 This is a side view of the multi-station automatic bottom thread changing equipment with the automatic bottom thread changing device located on the side of the storage tray;

[0022] Figure 3 yes Figure 2 A in the middle is an enlarged structural diagram;

[0023] Figure 4 It is a schematic diagram of the structure of the conductive copper sheet and the insulating circuit support plate;

[0024] Figure 5 This is a schematic diagram of the automatic bottom thread changing device running along the transverse guide mechanism;

[0025] Figure 6 It is a structural diagram of the contact conductive mechanism;

[0026] Figure 7 It is a schematic diagram of two automatic bottom thread changing devices running along the transverse guide mechanism;

[0027] Figure 8 This is a schematic diagram of the automatic origin search structure of the automatic bobbin thread changing device of the embroidery machine;

[0028] Figure 9 This is a schematic diagram of the three automatic bottom thread changing devices returning to the material tray replacement position along the horizontal guide mechanism;

[0029] Figure numerals: automatic bottom thread changing device 1, 1# automatic bottom thread changing device 101, 2# automatic bottom thread changing device 102, 3# automatic bottom thread changing device 103, body 11, storage tray 12, manipulator assembly 13, horizontal slider 14, contact conductive mechanism 15, fixing seat 151, insulating swing arm 152, conductive sheet 153, horizontal extension section 1531, horizontal extension section 1532, branch insulating swing arm 154, pin 155, torsion spring 156, power drive assembly 16, drive motor 161, drive Gear 162, distance sensor 17, working origin sensor 18, U-shaped groove 181, transverse guide mechanism 2, bracket 20, transverse slide 201, transverse guide rail 21, transverse rack 22, insulating circuit support plate 23, mounting groove 231, conductive copper bar 232, 1# origin position addressing baffle 24, 2# origin position addressing baffle 25, baffle mounting seat 251, 2# material tray replacement position sensor 26, 3# material tray replacement position sensor 27, shuttle box body 3, rotary hook 31, bobbin core 32, bobbin case 33. [Specific implementation method]

[0030] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0031] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0032] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. For example, the terms "upper," "lower," "front," "rear," "X-direction," "Y-direction," and the like, which indicate orientation or positional relationships, are based solely on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the utility model. They do not indicate or imply that the device or element referred to must have a specific orientation or be constructed or operated in a specific orientation. Therefore, they should not be construed as limiting the utility model.

[0033] In this utility model, unless otherwise specified or limited, the terms "installation," "connection," "fixation," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0036] like Figure 1 As shown, the multi-station automatic bobbin changing device includes a transverse guide mechanism 2 and an automatic bobbin changing device 1. For multi-head embroidery machines, multiple machine head and shuttle housing combinations are arranged horizontally. The upper portion is the machine head, and the lower portion corresponds to the shuttle housing 3. The shuttle housing 3 houses a rotary hook 31 and the bobbin thread mounted thereon. The bobbin thread here refers to the bobbin core 32 and bobbin case 33 combination used to hold the bobbin thread. When the bobbin thread runs out, it needs to be replaced, and the automatic bobbin changing device 1 is used to do this. The transverse guide mechanism 2 is positioned below the shuttle housing 3 and extends horizontally, sufficient to cover the entire length of the shuttle housing 3. This ensures that the automatic bobbin changing device 1 can move along the transverse guide mechanism 2 and reach the corresponding position in the shuttle housing 3 to complete the bobbin thread changing process. The number of automatic bobbin changing devices 1 can be one or more. As the number of heads in multi-head embroidery machines increases, multiple automatic bobbin changing devices 1 are typically installed, each responsible for changing the bobbin thread for a corresponding number of machine head and shuttle housing combinations.

[0037] The automatic bobbin thread changing device 1 includes a storage tray 12 for placing multiple bobbin threads and a manipulator assembly 13 for automatically changing the bobbin thread. The storage tray 12 and the manipulator assembly 13 are mounted on the body 11. The storage tray 12 can rotate. The storage tray is provided with multiple storage positions for placing bobbin threads along the circumference, and at least one empty position is reserved. The manipulator assembly 13 replaces the used bobbin thread on the rotary hook and places it on the empty position of the storage tray 12, and places the unused bobbin thread on the storage tray 12 on the rotary hook. Of course, if there is no unused bobbin thread on the storage tray, the entire storage tray needs to be replaced.

[0038] Therefore, the method used by the prior art automatic bobbin changing device 1 to change the bobbin thread is as follows: a storage tray is equipped with a bobbin core and a bobbin case with a pre-wound bobbin thread, referred to herein as a bobbin thread, which generally stores 10 pre-wound bobbins, and a space is reserved for the next bobbin thread to be replaced. When the bobbin thread needs to be replaced, the manipulator assembly 13 removes the empty bobbin thread from the shuttle on the embroidery machine and places it in the space reserved in the storage tray. Then, the manipulator assembly 13 is lifted, and the storage tray 12 rotates, rotating the pre-wound bobbin thread to a position where the manipulator assembly 13 can grab it. At this time, the manipulator assembly 13 grabs a pre-wound bobbin thread and places it in the shuttle of the embroidery machine, completing the replacement of the bobbin thread of one head of the embroidery machine. When the bobbin thread corresponding to the next head needs to be replaced, the automatic bobbin thread changing device with the storage tray 12 moves along the transverse guide mechanism 2 to the next head position, and then the manipulator assembly 13 repeats the cycle of the first head bobbin thread replacement action to complete the replacement of the second head bobbin thread, and so on, completing the replacement of the corresponding bobbin threads of the entire embroidery machine head.

[0039] Embroidery machines typically have different numbers of automatic bobbin changers depending on the number of heads. Currently, there's typically one automatic bobbin changer for every ten heads. Once the entire machine's bobbin thread is replaced, all the automatic bobbin changers move along the transverse guide mechanism 2 to one end of the machine, waiting for the worker to replace the empty bobbin storage tray with a fully wound one. Once the replacement is complete, the reset button is manually pressed to reset each automatic bobbin changer to its initial position, ready for the next job. This completes the machine's automatic bobbin change function.

[0040] like Figures 1 to 9 As shown, the transverse guide mechanism has an origin position corresponding to each automatic bobbin changer. For example, if one automatic bobbin changer can automatically change bobbins for 10 embroidery machine heads, an origin position is set for each automatic bobbin changer for every 10 heads. For example, if an embroidery machine has 30 heads, a total of three automatic bobbin changers are installed: 1# automatic bobbin changer 101, 2# automatic bobbin changer 102, and 3# automatic bobbin changer 103, with 1# automatic bobbin changer 101 being the first automatic bobbin changer in the transverse direction.

[0041] To prevent the automatic bobbin changing device from being unable to find its origin after restarting due to unexpected shutdown or power outages, the present invention is designed with an automatic origin-finding structure, including a working origin detection component disposed between the automatic bobbin changing device and the corresponding origin position, for detecting whether the automatic bobbin changing device has reached the corresponding origin position. The automatic bobbin changing device 1 is provided with a distance sensor 17 for measuring the lateral distance between two adjacent automatic bobbin changing devices.

[0042] The working origin detection assembly includes a working origin sensor 18 provided on the automatic bobbin changing device and an origin position addressing baffle provided corresponding to the origin position of each automatic bobbin changing device. The working origin sensor and the origin position addressing baffle cooperate to detect whether the automatic bobbin changing device has reached the corresponding origin position. Taking the example of setting up three automatic bobbin changing devices, three origin position addressing baffles are installed. Figure 8 The diagram shows the transverse partial structure of the embroidery machine. A 1# origin position addressing block 24 is provided corresponding to the 1# automatic bobbin changing device 101, a 2# origin position addressing block 25 is provided corresponding to the 2# automatic bobbin changing device 102, and a 3# origin position addressing block is provided corresponding to the 3# automatic bobbin changing device 103 (not shown for length reasons).

[0043] In addition, the lateral guide mechanism 2 is provided with an automatic positioning structure corresponding to the origin of the first automatic bobbin thread changing device. The automatic bobbin thread changing device and the automatic positioning structure are mechanically fixed, for example, by a snap-fit ​​structure. Therefore, after the first automatic bobbin thread changing device reaches the origin, it can automatically position itself based on information from the working origin sensor or in conjunction with the automatic positioning structure.

[0044] Specifically, the origin position addressing baffle is mounted on a baffle mounting seat 251. The transverse guide mechanism includes a transverse groove 201 extending in the transverse direction, and the baffle mounting seat 251 is mounted on the transverse groove 201. The transverse groove 201 is a T-shaped groove, and the baffle mounting seat 251 has a T-shaped portion that cooperates with the T-shaped groove to adjust the installation position. The baffle can be fixed in the set installation position by a locking screw. The origin position addressing baffle is an L-shaped structure, including a horizontal side and a vertical side extending vertically upward from one end of the horizontal side. The rear end of the horizontal side is fixed to the baffle mounting seat. The working origin sensor is provided with a downwardly opening U-shaped groove 181. The vertical side passes through the U-shaped groove during operation. The working origin sensor can be an infrared sensor, which is sensed when the origin position addressing baffle enters the U-shaped groove.

[0045] Preferably, the distance measuring sensor 17 may be an infrared distance measuring sensor, a proximity switch, or other sensors with similar functions.

[0046] Furthermore, the lateral guide mechanism 2 is equipped with a tray replacement position corresponding to the hopper tray replacement position of each automatic bobbin changer 1, and a tray replacement position sensor is provided for each tray replacement position. The tray replacement position of the first automatic bobbin changer coincides with the origin position. This is because the embroidery machine has a large number of heads, resulting in a relatively long overall length. It would be tiring for workers to run to the working origins of each automatic bobbin changer to replace the tray. Therefore, after each automatic bobbin changer has completed its work, they are gathered at one end of the embroidery machine, where workers can wait for tray replacement, saving physical effort. Therefore, all tray replacement positions and their corresponding tray replacement position sensors are located near the first lateral side. The origin position of the first automatic bobbin changer itself corresponds to the one end of the embroidery machine, and the tray replacement position and the working origin can share a single sensor. For example, only the first origin position addressing block 24 is provided, eliminating the need for a first tray replacement position sensor. However, a second tray replacement position sensor 26 is provided for the second automatic bobbin changer 102, and a third tray replacement position sensor 27 is provided for the third automatic bobbin changer 103. When the material tray needs to be replaced, other automatic bottom thread changing devices run to the 1# automatic bottom thread changing device 101 to find the corresponding material tray replacement position.

[0047] According to the above-mentioned automatic origin finding structure, when the automatic bobbin changing device is unexpectedly shut down or powered off, and then restarted, the automatic origin finding method can be executed in combination with some control logic. The automatic origin finding method of the automatic bobbin changing device of the embroidery machine includes the following steps:

[0048] After each automatic bottom thread changing device is turned on and restarted, it moves a short distance along the lateral guide mechanism to find the working origin. If the working origin detection component detects the corresponding origin position, the working origin is found. Once the working origin is found, the device can operate based on the working origin.

[0049] If the automatic bobbin changing device fails to find the working origin, all automatic bobbin changing devices will run to the first side in the horizontal direction, among which the first automatic bobbin changing device in the horizontal direction will run to the corresponding origin first (the origin of the first group of devices is mechanically fixed, and the working origin will be found as long as it runs to the end in one direction), and all other automatic bobbin changing devices will run to the first automatic bobbin changing device in the horizontal direction. When the other automatic bobbin changing devices are close to the set distance, the infrared distance sensor or proximity switch will send a signal to the control panel, and the control panel will control each device to run to the set distance and stop at the corresponding material tray replacement position (if the material tray needs to be replaced, it will be replaced, and if it is not needed, it will not be replaced, and it is left to the worker's discretion);

[0050] Then, other automatic bottom thread changing devices except the first automatic bottom thread changing device in the horizontal direction use this position as a reference and search for the working origin towards their respective origin positions.

[0051] In this way, problems such as chaotic device operation and collision caused by unexpected power outages during startup can be solved.

[0052] Reference Figure 1 As shown, the automatic bobbin thread changing device 1 is equipped with a power drive assembly 16. This power drive assembly 16 cooperates with the transverse guide mechanism 2 to enable the automatic bobbin thread changing device to move laterally along the transverse guide mechanism 2. Power drive assembly 16 includes a drive motor 161 and a power output component connected to drive motor 161. This power output component cooperates with the transverse guide mechanism to drive the automatic bobbin thread changing device. A power supply structure is provided between the automatic bobbin thread changing device 1 and the transverse guide mechanism 2 to power the power drive assembly 16.

[0053] In order to avoid the risk of jamming and non-conductivity in the existing power supply method, the power supply method between the automatic bottom thread changing device 1 and the transverse guide mechanism 2 can be improved, for example, a slingshot power supply method can be adopted.

[0054] like Figures 1 to 6 As shown, the power supply structure includes a power transmission circuit provided on the front side of the transverse guide mechanism 1 and extending transversely, and a contact conductive mechanism 15 provided on the automatic bottom thread changing device 1 , and the contact conductive mechanism 15 is connected to the drive motor 161 .

[0055] The plane where the power transmission circuit is located is arranged vertically. The contact conductive mechanism includes a fixed seat 151, an insulating swing arm 152 hinged to the fixed seat through a pin 155, a first spring arranged between the insulating swing arm and the fixed seat, and a conductive sheet 153 installed on the insulating swing arm. The first spring drives the insulating swing arm to swing horizontally relative to the plane where the power transmission circuit is located with the pin as the fulcrum, and makes the conductive sheet elastically fit the power transmission circuit.

[0056] Furthermore, the insulating swing arm 152 is hingedly connected to a branch insulating swing arm 154 via a pin. A second spring is provided between the branch insulating swing arm 154 and the insulating swing arm 152. A conductive sheet 153 is mounted on the branch insulating swing arm 154. The second spring drives the branch insulating swing arm to swing horizontally relative to the plane of the power transmission circuit with the pin as the fulcrum, and causes the conductive sheet to elastically conform to the power transmission circuit.

[0057] Preferably, the first and second springs are torsion springs 156, which are mounted on pins 155 and drive the insulating swing arm 152 and the branch insulating swing arm 154 to twist. Consequently, under the action of the torsion springs, the insulating swing arm and the branch insulating swing arm both swing toward the transverse guide mechanism 2, causing the conductive sheet 153 to contact the power transmission circuit for electrical conduction.

[0058] Furthermore, the conductive sheet 153 is provided with a transverse extension section 1531, the head of which is in contact with the power transmission circuit. The conductive sheet 153 is provided with a horizontal extension section 1532. The insulating swing arm 152 and the branch insulating swing arm 154 are provided with horizontal fixing surfaces that are in contact with the horizontal extension section 1532 and are fixed by screws, thereby fixing the conductive sheet 153 to the insulating swing arm 152 and the branch insulating swing arm 154.

[0059] The above-mentioned power supply structure adopts a slingshot-type power supply method. The first spring drives the insulating swing arm to swing horizontally relative to the plane where the transmission circuit is located with the pin shaft as the fulcrum, and makes the conductive sheet elastically fit the transmission circuit. The reaction force exerted on the conductive sheet by the transmission circuit during operation is opposite to the swinging direction, which makes it difficult for the conductive sheet to deform. This overcomes the risk of jamming and non-conductivity in the existing technology that uses brushes to contact the conductive sheet for conduction.

[0060] Moreover, the slingshot-type charging method has been used in trams and high-speed railways for many years, and its efficient and stable performance has been fully verified. Applying it to the automatic bottom thread changing device can greatly improve the stability and service life of the automatic bottom thread changing device. At the same time, it can also further increase the operating speed of the automatic bottom thread changing device and improve its efficiency.

[0061] In addition, the existing technology uses wireless communication for signal transmission between the automatic bottom line changing device and the host. Although wireless communication has been widely used, it encounters interference in some special situations when using wireless communication, and often encounters the phenomenon of poor information communication. If the device is installed near the interference source, it will not work. The only solution is to move the factory, which increases the customer's operating costs. To address this problem, the utility model combines the slingshot-type power supply method with the communication function, that is, the horizontal guide mechanism 2 is also provided with a communication circuit extending in the horizontal direction, and the contact conductive mechanism 15 is provided with a conductive sheet that is in contact with the communication circuit.

[0062] The communication circuit and the power transmission circuit share the same structure, both utilizing conductive copper bars 232. Specifically, the transverse guide mechanism 2 comprises a bracket 20, a transverse guide rail 2 mounted thereto, and an insulating circuit support plate 23. The power transmission and communication circuits are mounted on the insulating circuit support plate 23. In this embodiment, the power transmission circuit comprises at least two sets of conductive copper bars 232 arranged side by side, while the communication circuit comprises at least one row of conductive copper bars 232. Furthermore, the insulating circuit support plate 23 is provided with mounting slots 231 for mounting the conductive copper bars.

[0063] In this way, not only a power transmission circuit but also a communication circuit is laid on the transverse guide mechanism 2, that is, a "power transmission plus signal communication type electric shock guide rail" is formed. As shown in the figure, the "power transmission plus signal communication type electric shock guide rail" uses four rows of wires, that is, two power lines and two signal lines. For example, the two rows of wires on the upper side are power lines, which correspond to the conductive sheet 153 connected to an insulating swing arm 152 and a branch insulating swing arm 154 on the upper side, and the two rows of wires on the lower side are communication signal lines, which correspond to the conductive sheet 153 connected to an insulating swing arm 152 and a branch insulating swing arm 154 on the lower side. However, the functions required by this device can be completed by using three rows of wires, that is, two power lines and one signal line, or five rows of wires or more rows of wires. Of course, if the communication function is not considered, two power lines are sufficient, but if the communication function is considered, at least three rows of wires are required.

[0064] The above technical solution, since the contact conductive mechanism 15 adopts a slingshot contact conductive method with the power transmission circuit and the communication circuit, not only ensures the stability of the power supply, but also avoids the signal interference problem to the greatest extent, ensuring the stable operation of the equipment under various complex situations.

[0065] In order to completely avoid the risk of jamming and non-conductivity caused by the brush and the conductive sheet being in contact with each other in the prior art, as another embodiment, a contact power supply structure may not be provided, or a power drive assembly 16 may be provided on each automatic bottom thread changing device 1 while a traditional power supply structure is provided. Figure 7 As shown, the power drive assembly 16 also includes a power battery 163, with the power output component being a drive gear 162. Power battery 163 powers the drive motor 161. Without requiring contact for power, the power connection of the automatic bobbin thread changing device and the transverse guide mechanism are isolated during operation, thus avoiding potential problems associated with power connection during operation of the automatic bobbin thread changing device on the transverse guide mechanism.

[0066] Furthermore, the transverse guide mechanism 2 includes a contact charging cradle mounted in a fixed position on one side of the transverse guide rail. The automatic bobbin thread changing device 1 is provided with a charging port, which engages with the charging connector to charge the power battery 163. Alternatively, one of the contact charging cradle and the automatic bobbin thread changing device may be provided with a charging port, while the other may be provided with a charging connector. Alternatively, wireless charging technology may be employed, with the transverse guide mechanism 2 provided with a wireless charging cradle and the automatic bobbin thread changing device 1 provided with a wireless charging circuit, wirelessly connected to the wireless charging cradle to charge the power battery 163. In this manner, the automatic bobbin thread changing device 1 can be charged while in standby mode.

[0067] Of course, referring to the prior art, to achieve self-propelled operation of the automatic bobbin thread changing device 1, the power drive assembly 16 cooperates with the upper component of the transverse guide mechanism to form a self-propelled mechanism. Specifically, the transverse guide mechanism further comprises a transverse rack 22 arranged parallel to the transverse guide rail 21. The power output component is a drive gear 162 meshing with the transverse rack, and the drive motor 161 is connected to the drive gear 162. The drive motor 161 drives the drive gear 162, thereby driving the entire automatic bobbin thread changing device 1 to translate along the transverse guide rail 21 and accurately position itself.

[0068] In addition, the transverse rack 22 is arranged below the transverse guide rail 21 with the tooth surface facing downward. The driving gear is a spur helical gear. The automatic bottom thread changing device 1 is provided with a transverse slider 14 that is slidably engaged with the transverse guide rail 21.

[0069] It is understood that the transmission structure of the drive gear 162 and the transverse rack 22 can also be replaced with other transmission structures. For example, the transverse guide mechanism can be provided with a synchronous belt instead of the transverse rack, the power output component can be a synchronous pulley engaged with the synchronous belt, and the drive motor can drive the synchronous pulley to rotate. In another example, the transverse guide mechanism can be provided with a chain instead of the transverse rack, the power output component can be a sprocket engaged with the chain, and the drive motor can drive the sprocket to rotate.

[0070] Preferably, the drive motor is a stepping motor, the power battery is a lithium battery, and the drive motor is installed at the bottom of the automatic bottom thread changing device.

[0071] Furthermore, according to the signal of the distance measuring sensor 17, if the distance is too close, the machine can stop running to avoid collision. The automatic bottom thread changing device is provided with a wireless communication module, which receives wireless control signals through the wireless communication module to achieve self-propelled operation.

[0072] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art will understand that the utility model includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the utility model are intended to be included within the scope of the claims.

Claims

1. The automatic bobbin changing device of the embroidery machine automatically finds the origin structure, at least two automatic bobbin changing devices move along the transverse guide mechanism, and the transverse guide mechanism is provided with an origin position corresponding to each automatic bobbin changing device, characterized in that: A working origin detection component is provided between the automatic bobbin thread changing device and the corresponding origin position, for detecting whether the automatic bobbin thread changing device has run to the corresponding origin position.

2. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 1 is characterized in that: The automatic bobbin thread changing device is provided with a distance measuring sensor for measuring the horizontal distance between two adjacent automatic bobbin thread changing devices.

3. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 1 is characterized in that: The working origin detection component includes a working origin sensor provided on the automatic bobbin thread changing device and an origin position addressing baffle provided corresponding to the origin position of each automatic bobbin thread changing device. The working origin sensor and the origin position addressing baffle cooperate to detect whether the automatic bobbin thread changing device has run to the corresponding origin position.

4. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 3 is characterized in that: The origin position addressing baffle is installed on a baffle mounting seat, the transverse guide mechanism includes a transverse sliding groove extending in the transverse direction, and the baffle mounting seat is installed in the transverse sliding groove.

5. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 4 is characterized in that: The origin position addressing baffle is an L-shaped structure, including a horizontal side and a vertical side extending vertically upward from one end of the horizontal side. The rear end of the horizontal side is fixed to the baffle mounting seat. The working origin sensor is provided with a U-shaped groove opening downward, and the vertical side passes through the U-shaped groove during operation.

6. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 2 is characterized in that: The distance measuring sensor is an infrared distance measuring sensor; or the distance measuring sensor is a proximity switch.

7. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 1 is characterized in that: The lateral guide mechanism is provided with a material tray replacement position corresponding to the replacement storage tray position of each automatic bottom line changing device and a material tray replacement position sensor is provided corresponding to the replacement material tray position. The replacement material tray position of the first automatic bottom line changing device in the horizontal direction coincides with the origin position.

8. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 1 is characterized in that: The transverse guide mechanism is provided with an automatic positioning structure corresponding to the origin position of the first automatic bottom thread changing device in the transverse direction.

9. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 1 is characterized in that: The transverse guide mechanism includes a transverse rack, and the automatic bottom thread changing device is provided with a drive motor and a drive gear. The transverse rack is engaged with the drive gear, and the drive motor drives the drive gear to rotate.

10. The automatic origin finding structure of the automatic bobbin thread changing device of the embroidery machine according to claim 9, characterized in that: The transverse guide mechanism includes a transverse guide rail, and the automatic bottom thread changing device is provided with a transverse slider that is slidably matched with the transverse guide rail.

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