Automatic bottom line replacing device and storage disc mounting structure thereof

Abstract

The utility model discloses an automatic bottom thread replacing device and a storage disc mounting structure thereof, and a storage disc is mounted on an automatic bottom thread replacing device body. The storage disc mounting structure comprises a mounting base arranged on the automatic bottom line replacing device body, a transmission shaft penetrating through the mounting base and a transmission shaft hole formed in the center of a storage disc and in transmission fit with the transmission shaft, and a lock catch for axially locking the storage disc and the mounting base is arranged between the storage disc and the mounting base. When the material storage disc is installed, the transmission shaft hole in the material storage disc is aligned with the transmission shaft, then the material storage disc is pushed to axially move with proper force, and after the material storage disc axially moves in place, the material storage disc and the installation base are buckled and fixed through the lock catch, so that the material storage disc is fixed to the installation base, and it is guaranteed that the material storage disc is reliably fixed after being replaced and cannot be disengaged in the working process; when the material storage disc is disassembled, locking of the lock catch is released, the material storage disc is pulled out, and the transmission shaft hole is separated from the transmission shaft, so that the material storage disc is convenient to replace.

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] The automatic bobbin thread changing devices currently on the market achieve the purpose of automatically changing the bobbin thread by automatically replacing the bobbin case and bobbin core. Referring to the Chinese invention patent application with publication number CN 110340628 A, a multi-station robotic arm bobbin thread changing device is disclosed, which can be responsible for the bobbin thread changing work of several preset stations, and the disassembled bobbin case and spare bobbin case are placed in the bobbin thread storage tray. Specifically, the device structure includes a horizontal guide mechanism and a bobbin thread changing device, and the bobbin thread changing device includes a bobbin thread gripper, a rectangular coordinate robotic arm, a translation base, a rotary drive mechanism and a bobbin thread storage tray. The rectangular coordinate robotic arm is arranged on the translation base, the bobbin thread gripper is arranged at the end of the rectangular coordinate robotic arm, and the rotary drive mechanism is arranged on one side of the translation base. The rotary drive mechanism is detachably connected to the bobbin thread storage tray, and the rotary drive mechanism drives the bobbin thread storage tray to rotate. Several bobbin thread storage stations are arranged around the bobbin thread storage tray, and the translation base is slidably connected to the horizontal guide rail.

[0003] Wherein, a rotary drive motor is arranged on the positioning plate to drive the connecting disk to rotate, and the connecting disk is detachably connected to the bobbin case storage disk. A driving shaft is arranged at the center of the end face of the connecting disk, and a pin hole is arranged on the end face of the connecting disk on one side of the driving shaft. An axial hole that matches the driving shaft is arranged on the side of the bobbin case storage disk close to the connecting disk, and a positioning pin that matches the pin hole is arranged on the same side of the bobbin case storage disk. The bobbin case storage disk is provided with a first magnet on the disk surface on the side where the axial hole is provided, and the connecting disk surface is provided with a second magnet, and the first magnet and the second magnet are opposite in polarity. Although the cooperation between the drive shaft and the axial hole, and the positioning pin and the pin hole can circumferentially position the storage disk, it is difficult to ensure reliable axial positioning by relying solely on the attraction of the first magnet and the second magnet, especially the vibration transmitted during the high-speed operation of the machine, which can easily cause the storage disk to be axially dislocated, resulting in the inability to cooperate with the bobbin case gripper, and in severe cases, it can cause detachment. [Utility Model Content]

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an automatic bottom thread changing device and a material storage tray mounting structure thereof, so as to solve the problem that the material storage tray positioning is unreliable and easy to be misplaced.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] First, a material storage tray mounting structure of an automatic bottom thread changing device is provided, wherein the material storage tray is mounted on the main body of the automatic bottom thread changing device. The material storage tray mounting structure includes a mounting base arranged on the main body of the automatic bottom thread changing device, a transmission shaft passing through the mounting base, a transmission shaft hole arranged in the center of the material storage tray and coordinated with the transmission shaft, and a lock for axially locking the material storage tray and the mounting base.

[0007] Preferably, the lock includes a lock pin movably connected to the storage tray and a locking portion provided on the mounting base and cooperating with the lock pin, and the storage tray is provided with a guide portion for guiding the radial movement of the lock pin.

[0008] Preferably, the locking pin includes a latch plate and a spring connected to the latch plate, a limit groove is provided on the latch plate, the locking portion is a limit surface arranged back to the storage tray, the mounting base passes through the limit groove, the spring drives the latch plate to move radially, and the limit groove cooperates with the limit surface.

[0009] Preferably, the guide portion is a latch groove provided on the end surface of the storage tray and extending radially, and the latch plate moves radially along the latch groove.

[0010] Preferably, a receiving groove for receiving the mounting base is provided in the latch groove.

[0011] Preferably, the mounting base is provided with an inclined thrust transition surface facing the installation direction of the storage tray. When the storage tray is installed along the installation direction, the inclined thrust transition surface cooperates with the limit groove to push the latch plate to move radially so that the mounting base passes through the limit groove.

[0012] Preferably, the latch plate is connected to a limit pin, and the bottom wall of the latch slot is provided with a guide slot extending radially, and the limit pin cooperates with the guide slot to guide the latch plate to move radially along the latch slot.

[0013] Preferably, a cut-proof hand pressing portion is provided at the radial outer end of the latch plate.

[0014] Preferably, the mounting base is provided with a zero-point positioning pin on the radial outer side of the transmission shaft, and the storage tray is provided with a zero-point positioning hole that cooperates with the zero-point positioning pin.

[0015] In addition, an automatic bottom thread changing device is also provided, which includes the material storage tray installation structure.

[0016] The utility model adopts the above technical solution, which has the following technical effects: when installing the storage tray, the transmission shaft hole on the storage tray is aligned with the transmission shaft, and then the storage tray is pushed axially with appropriate force. After the storage tray moves axially into place, the lock buckle buckles and fixes the storage tray and the mounting base, so that the storage tray is fixed on the mounting base, ensuring that the storage tray is securely fixed after replacement and will not fall out during work; when disassembling the storage tray, the lock of the lock buckle is released, the storage tray is pulled out, and the transmission shaft hole is separated from the transmission shaft, which also facilitates the replacement of the storage tray.

[0017] 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

[0018] The utility model is further described below with reference to the accompanying drawings:

[0019] Figure 1 This is a partial structural diagram of a multi-station automatic bottom thread changing device;

[0020] Figure 2 It is a structural diagram of the storage tray;

[0021] Figure 3 It is a structural diagram of the storage tray;

[0022] Figure 4 This is a schematic diagram of the installation of the storage tray;

[0023] Figure 5 This is a schematic diagram of the installation of the storage tray;

[0024] Drawing symbols: automatic bottom thread changing device 1, main body 11, mounting base 111, inclined thrust transition surface 1111, limiting surface 1112, transmission shaft 112, zero point positioning pin 113, storage tray 12, latch plate 121, limiting groove 1211, anti-cut hand pressing portion 1212, pin hole 1213, lug 1214, latch groove 122, accommodating groove 123, transmission shaft hole 124, zero point positioning hole 125, limiting pin 126, spring 127, spring mounting hole 128, manipulator assembly 13, lateral guide mechanism 2, shuttle box body 3, rotary hook 31, bobbin core 32, bobbin case 33. [Specific implementation method]

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1As shown, the multi-station automatic bobbin thread changing device includes a transverse guide mechanism 2 and an automatic bobbin thread changing device 1. For a multi-head embroidery machine, multiple sets of machine heads and shuttle boxes are arranged horizontally, with the machine heads at the top and the shuttle box 3 at the bottom. The shuttle box 3 is equipped with a rotary hook 31 and the bobbin thread mounted on it. The bobbin thread here refers to the bobbin core 32 and bobbin case 33 combination used to hold the bobbin thread. If the bobbin thread runs out, the bobbin core 32 and bobbin case 33 combination must be replaced, and the automatic bobbin thread changing device 1 is used to replace the bobbin thread. The transverse guide mechanism 2 is arranged below the shuttle box 3 and extends horizontally. Its length is sufficient to cover the entire length of the shuttle boxes 3. This ensures that the automatic bobbin thread changing device 1 can operate along the transverse guide mechanism 2 and reach the corresponding position in the shuttle box 3 to complete the bobbin thread changing process. Among them, the number of automatic bottom thread changing devices 1 can be one or more. Because the number of heads of multi-head embroidery machines is increasing, multiple automatic bottom thread changing devices 1 are usually set up. Each automatic bottom thread changing device 1 is responsible for the combination of a corresponding number of machine heads and shuttle boxes to change the bottom thread.

[0032] 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 is rotatable and has multiple storage positions for placing bobbin threads along the circumference of the storage tray 12, with at least one empty position 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 onto the rotary hook. Of course, if there is no unused bobbin thread on the storage tray, the entire storage tray needs to be replaced.

[0033] 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 a set angle, 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.

[0034] 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.

[0035] In order to facilitate the replacement of the storage tray and ensure that the storage tray is securely fixed after replacement, Figures 1 to 5 As shown, a material storage tray mounting structure is provided. The material storage tray 12 is mounted on the main body 11 of the automatic bottom thread changing device. The material storage tray mounting structure includes a mounting base 111 provided on the main body 11, a transmission shaft 112 that movably passes through the mounting base 111, and a transmission shaft hole 124 provided at the center of the material storage tray 12 and in transmission engagement with the transmission shaft 112. A lock is provided between the material storage tray 12 and the mounting base 111 to axially lock the material storage tray 12 and the mounting base 111. The drive shaft hole 124 engages with the drive shaft, which can drive the material storage tray to rotate. The automatic bottom thread changing device is provided with a material tray rotation drive motor that drives the drive shaft to rotate. The lock locks the material storage tray 12 axially to the mounting base 111, but the material storage tray can rotate normally.

[0036] When installing the storage tray, the transmission shaft hole on the storage tray is aligned with the transmission shaft, and then the storage tray is pushed axially with appropriate force. After the storage tray moves axially into place, the lock buckle fastens the storage tray 12 and the mounting base 111, so that the storage tray is fixed on the mounting base, ensuring that the storage tray is securely fixed after replacement and will not fall out during work; when removing the storage tray, release the lock buckle, pull the storage tray outward, and separate the transmission shaft hole from the transmission shaft, which also facilitates the replacement of the storage tray.

[0037] Specifically, the lock includes a lock pin provided on the storage tray and a locking portion provided on the mounting base and cooperating with the lock pin. The storage tray 12 is provided with a guide portion for guiding the radial movement of the lock pin. The lock pin includes a latch plate 121 and a spring 127 connected to the latch plate. The storage tray 12 is provided with a latch slot 122, which serves as a guide portion, along which the latch plate 121 moves. The storage tray is disc-shaped, and the latch slot extends radially, corresponding to the latch plate 121 moving radially. The latch plate 121 is provided with a limiting slot 1211. The locking portion is a limiting surface 1112 provided on the mounting base 111, which is located away from the storage tray 12. The mounting base 111 passes through the limiting slot 1211. The spring 127 drives the latch plate 121 to move radially, and the limiting slot 1211 cooperates with the limiting surface 1112. Since one end of the mounting base 111 abuts against the material storage tray, and the limiting groove 1211 cooperates with the limiting surface 1112 , the material storage tray 12 and the mounting base 111 can be axially locked.

[0038] It is understood that the mounting base 111 can be a disc-shaped structure, and correspondingly, the retaining groove 1211 can also be a circular groove, an elliptical groove, or other shapes. However, in order to allow the mounting base to pass through the retaining groove, the diameter of the retaining groove 1211 is larger than the diameter of the mounting base 111. Of course, it is understood that after the mounting base 111 passes through the retaining groove 1211, the partial arc of the retaining groove mates with the retaining surface.

[0039] Furthermore, a receiving groove 123 is provided in the latch groove 122 for receiving the mounting base 111 , and one end of the mounting base 111 abuts against the bottom of the receiving groove 123 . In addition, a transmission shaft hole 124 passes through the bottom of the receiving groove 123 .

[0040] like Figure 5 As shown, the mounting base 111 is provided with an inclined thrust transition surface 1111 facing the storage tray installation direction. When the storage tray is installed along the installation direction, the inclined thrust transition surface 1111 cooperates with the limiting groove 1211 to push the latch plate 121 radially, that is, radially outward, so that the mounting base 111 passes through the limiting groove 1211. Because the mounting base 111 is a disc-shaped structure, the inclined thrust transition surface 1111 is a conical surface provided on the outer circle of the mounting base 111. Naturally, when the mounting base passes through the limiting groove, the inclined thrust transition surface 1111 cooperates with the partial circular arc of the limiting groove.

[0041] Furthermore, the latch plate 121 is connected to a limit pin 126. The bottom wall of the latch slot is provided with a radially extending guide slot 1221, for example, a waist-shaped slot, outside the receiving slot. The limit pin 126 cooperates with the guide slot 1221 to guide the latch plate's radial movement along the latch slot. Thus, the latch plate 121 can move within a certain range relative to the guide slot 1221. The latch plate 121 is provided with a pin hole 1213 for receiving the limit pin.

[0042] To facilitate the circumferential positioning of the accumulator tray 12 relative to the mounting base 111, the mounting base 111 is provided with a zero-point positioning pin 113, located on the mounting base 111 at a position offset from the drive shaft. The accumulator tray 12 is provided with a zero-point positioning hole 125, which cooperates with the zero-point positioning pin 113. Of course, the zero-point positioning hole 125 extends through the bottom of the receiving groove 123. The drive shaft hole 124 on the accumulator tray is aligned with the drive shaft 112, and the zero-point positioning hole 125 is aligned with the zero-point positioning pin 113 on the mounting base. The accumulator tray is then mounted on the mounting base. After installation, the zero-point position can be determined, and the zero-point position serves as a reserved space.

[0043] In addition, the latch plate 121 is provided with a cut-proof hand-pressing portion 1212 at its radially outer end. Pulling the latch plate 121 radially outward through the cut-proof hand-pressing portion 1212 releases the axial lock between the retaining groove and the retaining surface, preventing hand injury during operation. The latch plate 121 is provided with lugs 1214 on both sides of the radially inner width of the cut-proof hand-pressing portion 1212, which engage one end of a spring. The storage tray is provided with a spring mounting hole 128, into which the other end of the spring is mounted.

[0044] It is understandable that the outer circle of the storage tray 12 is provided with a bottom line positioning structure corresponding to the storage position along the circumference, and the specific structure can refer to the existing technology. The transmission shaft 112 is driven by the tray rotation drive motor to rotate, driving the storage tray to rotate.

[0045] It is understandable that the structure of the lock can be changed in other ways.

[0046] Before using the automatic bottom thread changing device, the wound bottom thread needs to be buckled onto the bottom thread positioning structure of the storage tray. The storage tray cannot be full. There is a vacant storage position at the zero point, and no bottom thread is installed. Then install the storage tray on the automatic bottom thread changing device. The installation method is to align the storage tray drive shaft hole with the drive shaft on the automatic bottom thread changing device, and align the zero point positioning hole on the storage tray with the positioning pin on the mounting base. Then push it with appropriate force. At this time, the latch plate on the storage tray is pushed by the inclined thrust transition surface on the mounting base to move in a radial direction of the storage tray, so that the mounting base passes through the latch plate limit slot smoothly. After the mounting base passes through the latch plate limit slot, the spring will push the latch plate in the opposite direction of the previous movement, so that the latch plate limit slot and the limit surface cooperate to clamp the mounting base. In this way, the storage tray is fixed on the mounting base and will not fall out during operation.

[0047] 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 material storage tray installation structure of the automatic bobbin thread changing device is installed on the main body of the automatic bobbin thread changing device, which is characterized by: The material storage tray mounting structure includes a mounting base provided on the body of the automatic bottom thread changing device, a transmission shaft passing through the mounting base, a transmission shaft hole provided in the center of the material storage tray and mated with the transmission shaft, and a lock that axially locks the material storage tray and the mounting base.

2. The material storage tray installation structure of the automatic bottom thread changing device according to claim 1 is characterized in that: The lock buckle includes a lock pin movably connected to the storage tray and a locking portion provided on the mounting base and cooperating with the lock pin. The storage tray is provided with a guide portion for guiding the radial movement of the lock pin.

3. The material storage tray installation structure of the automatic bottom thread changing device according to claim 2 is characterized in that: The lock pin includes a latch plate and a spring connected to the latch plate. A limit groove is provided on the latch plate. The locking portion is a limit surface arranged back to the storage tray. The mounting base passes through the limit groove. The spring drives the latch plate to move radially and makes the limit groove cooperate with the limit surface.

4. The material storage tray installation structure of the automatic bottom thread changing device according to claim 3 is characterized in that: The guide portion is a latch groove provided on the end surface of the storage tray and extending radially, and the latch plate moves radially along the latch groove.

5. The material storage tray installation structure of the automatic bottom thread changing device according to claim 4 is characterized in that: An accommodating groove for accommodating the mounting base is provided in the latch groove.

6. The material storage tray installation structure of the automatic bottom thread changing device according to claim 4, characterized in that: The mounting base is provided with an inclined thrust transition surface facing the mounting direction of the storage tray. When the storage tray is installed along the mounting direction, the inclined thrust transition surface cooperates with the limit groove to push the latch plate to move radially so that the mounting base passes through the limit groove.

7. The material storage tray installation structure of the automatic bottom thread changing device according to claim 4, characterized in that: The latch plate is connected to a limit pin, and the bottom wall of the latch slot is provided with a guide slot extending in the radial direction. The limit pin cooperates with the guide slot to guide the latch plate to move radially along the latch slot.

8. The material storage tray installation structure of the automatic bottom thread changing device according to claim 3, characterized in that: The radial outer end of the latch plate is provided with an anti-cutting hand pressing portion.

9. The material storage tray installation structure of the automatic bottom thread changing device according to claim 1, characterized in that: The mounting base is provided with a zero point positioning pin on the radial outer side of the transmission shaft, and the storage tray is provided with a zero point positioning hole that cooperates with the zero point positioning pin.

10. Automatic bottom thread changing device, characterized in that: It includes the storage tray installation structure described in any one of claims 1 to 9.

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