Automatic bottom line replacing device and storage disc mounting structure thereof

Abstract

The invention discloses an automatic bottom thread changing device and a storage disc mounting structure thereof.The storage disc is mounted on an automatic bottom thread changing device body, and the storage disc mounting structure comprises a mounting base arranged on the automatic bottom thread changing device body, a transmission shaft penetrating through the mounting base and a transmission shaft hole formed in the center of the 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 invention belongs to the technical field of embroidery equipment, and in particular relates to an automatic bottom thread changing device for an embroidery machine. [Background technology]

[0002] The automatic bobbin thread changing device currently on the market achieves the purpose of automatically changing the bobbin thread by automatically changing the bobbin case and the bobbin core. Referring to the Chinese invention patent application with the publication number CN 110340628 A, a multi-station mechanical arm bobbin case changing device is disclosed, which can be responsible for the bobbin case changing work of several preset stations, and the disassembled bobbin case and the spare bobbin case are placed on the bobbin case storage tray. Specifically, the equipment structure includes a horizontal guide mechanism and a bobbin case changing device, the bobbin case changing device includes a bobbin case gripper, a rectangular coordinate mechanical arm, a translation base, a rotary drive mechanism and a bobbin case storage tray, the rectangular coordinate mechanical arm is arranged on the translation base, the bobbin case gripper is arranged at the end of the rectangular coordinate mechanical arm, the rotary drive mechanism is arranged on one side of the translation base, the rotary drive mechanism is detachably connected to the bobbin case storage tray, the rotary drive mechanism drives the bobbin case storage tray to rotate, and a number of bobbin case storage stations are arranged around the bobbin case 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 matching the driving shaft is arranged on the side of the bobbin case storage disk close to the connecting disk, and a positioning pin matching 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 arranged, and a second magnet is arranged on the disk surface of the connecting disk, and the first magnet and the second magnet are opposite in polarity. Although the cooperation between the driving shaft and the axial hole, and the positioning pin and the pin hole can position the storage disk circumferentially, 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 is easy to cause the storage disk to be axially dislocated, resulting in the inability to cooperate with the bobbin case gripper, and in severe cases, it will cause separation. [Summary of the invention]

[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] Firstly, a material storage tray mounting structure of an automatic threading line changing device is provided, wherein the material storage tray is mounted on a main body of the automatic threading line changing device, and the material storage tray mounting structure comprises a mounting base arranged on the main body of the automatic threading line changing device, a transmission shaft passing through the mounting base, a transmission shaft hole arranged at the center of the material storage tray and cooperating with the transmission shaft, and a lock for axially locking the material storage tray and the mounting base.

[0007] Preferably, the lock buckle comprises a lock pin movably connected to the material storage tray and a locking portion provided on the mounting base and cooperating with the lock pin, and the material 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, the latch plate is provided with a limit groove, 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 mounting direction of the storage tray. When the storage tray is installed along the mounting direction, the inclined thrust transition surface cooperates with the limiting groove to push the latch plate to move radially so that the mounting base passes through the limiting groove.

[0012] Preferably, the latch plate is connected to a limit pin, the bottom wall of the latch slot is provided with a guide slot extending in the radial direction, 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, comprising the material storage tray installation structure.

[0016] The present invention adopts the above technical scheme and 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 is axially moved into place, the lock buckle buckles and fixes the storage tray and the installation base, so that the storage tray is fixed on the installation base, ensuring that the storage tray is reliably 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, thereby facilitating 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 invention will be further described below with reference to the accompanying drawings:

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

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

[0021] Figure 3 It is a schematic diagram of the structure 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] Figure numerals: 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 technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0026] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0027] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "front", "rear", "lateral", etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 bottom thread changing equipment includes a transverse guide mechanism 2 and an automatic bottom thread changing device 1. For a multi-head embroidery machine, multiple sets of machine heads and shuttle boxes are arranged in a corresponding manner along the transverse direction, wherein the upper side is the machine head and the lower side corresponds to the shuttle box 3, on which the shuttle box 3 is provided with a rotary shuttle 31 and a bottom thread installed on the rotary shuttle. The bottom thread here refers to a combination kit of a bobbin 32 and a bobbin case 33 for placing the bottom thread. If the bottom thread is used up, the bottom thread needs to be replaced, that is, the combination kit of the bobbin 32 and the bobbin case 33, and the automatic bottom thread changing device 1 is used to replace the bottom thread. The transverse guide mechanism 2 is arranged below the shuttle box 3 and extends in the transverse direction. Its length is sufficient to cover the arrangement length of all shuttle boxes 3, so as to ensure that the automatic bottom thread changing device 1 runs along the transverse guide mechanism 2 and can run to the corresponding position of the shuttle box 3 to complete the bottom thread changing work. Among them, the number of automatic bobbin thread changing devices 1 can be one or more. Because the number of heads of multi-head embroidery machines is increasing, multiple automatic bobbin thread changing devices 1 are usually set up. Each automatic bobbin thread changing device 1 is responsible for changing the bobbin thread in a corresponding number of machine heads and shuttle box combinations.

[0032] The automatic bottom thread changing device 1 includes a storage tray 12 for placing multiple bottom threads and a manipulator assembly 13 for automatically changing bottom threads. The storage tray 12 can rotate. The storage tray 12 is provided with multiple storage positions for placing bottom threads along the circumference, and at least one empty position is reserved. The manipulator assembly 13 replaces the used bottom thread on the rotary hook and places it on the empty position of the storage tray 12, and places the unused bottom thread on the storage tray 12 on the rotary hook. Of course, if there is no unused bottom thread on the storage tray, the storage tray needs to be replaced as a whole.

[0033] Therefore, the method adopted by the automatic bottom line changing device 1 in the prior art to change the bottom line is: the storage tray is equipped with a bobbin core and a bobbin case with a wound bottom line, which is referred to as the bottom line here. Generally, 10 wound bottom lines are stored, and an empty space is reserved for the replacement bottom line. When the bottom line needs to be replaced, the manipulator assembly 13 will take out the empty bottom line on the shuttle of the embroidery machine and place it in the empty space reserved in the storage tray. Then, the manipulator assembly 13 is lifted, and the storage tray 12 rotates a set angle to rotate the wound bottom line to a position where the manipulator assembly 13 can grab it. At this time, the manipulator assembly 13 grabs a wound bottom line and places it in the shuttle of the embroidery machine, completing the replacement of the bottom line of one head of the embroidery machine. When the bottom line corresponding to the next head needs to be replaced, the automatic bottom line changing device moves to the next head position with the storage tray 12 along the lateral guide mechanism 2, and then the manipulator assembly 13 repeats the cycle of the first head bottom line replacement action to complete the replacement of the second head bottom line, and so on, to complete the replacement of the corresponding bottom line of the entire embroidery machine head.

[0034] Generally, different numbers of heads of embroidery machines are equipped with different numbers of automatic bobbin thread changing devices. Currently, there is generally one automatic bobbin thread changing device for every 10 heads. When the bobbin thread of the entire embroidery machine is replaced, all the automatic bobbin thread changing devices will move to one end of the embroidery machine along the horizontal guide mechanism 2, waiting for the worker to replace the empty bobbin thread storage tray with the bobbin thread storage tray. After the replacement is completed, the reset button is manually pressed to reset each automatic bobbin thread changing device to its initial position for replacing the bobbin thread, in preparation for the next work, thereby completing the automatic bobbin thread changing function of the embroidery machine.

[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 installation structure is provided, wherein the material storage tray 12 is installed on the body 11 of the automatic bottom line changing device, and the material storage tray installation structure comprises a mounting base 111 provided on the body 11, a transmission shaft 112 that movably passes through the mounting base 111, and a transmission shaft hole 124 that is provided at the center of the material storage tray 12 and is in transmission cooperation with the transmission shaft 112, and a lock buckle that axially locks the material storage tray 12 and the mounting base 111 is provided between the material storage tray 12 and the mounting base 111. The transmission shaft hole 124 cooperates with the transmission shaft, and the transmission shaft can drive the material storage tray to rotate, and the automatic bottom line changing device is provided with a material tray rotation drive motor to drive the transmission shaft to rotate. The lock buckle axially locks the material storage tray 12 and 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 buckles and fixes 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 reliably fixed after replacement and will not fall out during work; when disassembling the storage tray, release the lock buckle, pull the storage tray outward, and separate the transmission shaft hole from the transmission shaft, thereby facilitating the replacement of the storage tray.

[0037] Specifically, the lock buckle includes a lock pin provided on the material storage tray and a locking portion provided on the mounting base and cooperating with the lock pin. The material 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 material storage tray 12 is provided with a latch groove 122 as a guide portion, and the latch plate 121 moves along the latch groove 122. The material storage tray is in the shape of a disc, and the latch groove extends radially, and the corresponding latch plate 121 moves radially. The latch plate 121 is provided with a limiting groove 1211, and the locking portion is a limiting surface 1112 provided on the mounting base 111 facing away from the material storage tray 12. The mounting base 111 passes through the limiting groove 1211, and the spring 127 drives the latch plate 121 to move radially, and the limiting groove 1211 cooperates with the limiting surface 1112. Since one end of the mounting base 111 is in contact with the material storage tray, and the limiting groove 1211 is matched with the limiting surface 1112 , the material storage tray 12 and the mounting base 111 can be axially locked.

[0038] It is understandable that the mounting base 111 may be a disc-shaped structure, and correspondingly, the limiting groove 1211 may also be a circular groove, an elliptical groove, or other shapes. However, in order to allow the mounting base to pass through the limiting groove, the diameter of the limiting groove 1211 is larger than the diameter of the mounting base 111. Of course, it is understandable that after the mounting base 111 passes through the limiting groove 1211, the local arc of the limiting groove cooperates with the limiting 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 mounting direction of the material storage tray. When the material storage tray is installed along the mounting direction, the inclined thrust transition surface 1111 cooperates with the limiting groove 1211 to push the latch plate 121 to move radially, that is, to move radially outward, so that the mounting base 111 passes through the limiting groove 1211. Since 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. Of course, when the mounting base passes through the limiting groove, the inclined thrust transition surface 1111 cooperates with the local arc of the limiting groove.

[0041] Furthermore, the latch plate 121 is connected to a limit pin 126, and the bottom wall of the latch slot is provided with a guide slot 1221 extending radially outside the receiving slot, for example, the guide slot is a waist-shaped slot. The limit pin 126 cooperates with the guide slot 1221 to guide the latch plate to move radially along the latch slot. Therefore, 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 installing the limit pin.

[0042] In order to facilitate the positioning of the circumferential position of the storage tray 12 relative to the mounting base 111, the mounting base 111 is provided with a zero point positioning pin 113, which is located on the mounting base 111 and deviates from the transmission shaft position, and the storage 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 passes through the bottom of the receiving groove 123. The transmission shaft hole 124 on the storage tray is aligned with the transmission shaft 112, and the zero point positioning hole 125 is aligned with the zero point positioning pin 113 on the mounting base, and then the storage tray is installed on the mounting base. After the installation is completed, the zero point position can be located, and the zero point position is used as a reserved space.

[0043] In addition, the radial outer end of the latch plate 121 is provided with an anti-cutting hand pressing portion 1212. By pulling the latch plate 121 radially outward through the anti-cutting hand pressing portion 1212, the axial locking between the limit groove and the limit surface can be released, and hand injury can be avoided during operation. The latch plate 121 is provided with lugs 1214 on both sides of the width of the radial inner side of the anti-cutting hand pressing portion 1212, which cooperate with one end of the spring, and the storage tray is provided with a spring mounting hole 128, and the other end of the spring is installed in the spring mounting hole.

[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 circumferential direction, and the specific structure can refer to the prior art. The transmission shaft 112 is driven to rotate by the tray rotation drive motor, driving the storage tray to rotate.

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

[0046] Before using the automatic bottom line changing device, the wound bottom line needs to be buckled on the bottom line positioning structure of the storage tray. The storage tray cannot be filled. There is a vacant storage position at the zero point, and no bottom line is installed. Then install the storage tray on the automatic bottom line changing device. The installation method is to align the storage tray drive shaft hole with the drive shaft on the automatic bottom line changing device, align the zero point positioning hole on the storage tray with the positioning pin on the mounting base, and 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 and moves 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 upper limit slot cooperates with the limit surface and clamps 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 is only a specific embodiment of the invention, but the protection scope of the invention is not limited thereto. Those skilled in the art should understand that the invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the invention will be included in the scope of the claims.

Claims

1. The material storage tray installation structure of the automatic thread changing device, the material storage tray is installed on the body of the automatic thread changing device, characterized in that: The material storage tray mounting structure includes a mounting base arranged on the 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 mating 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 comprises a lock pin movably connected to the material storage tray and a locking portion arranged on the mounting base and cooperating with the lock pin. The material 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 locking pin includes a latch plate and a spring connected to the latch plate, a limiting groove is provided on the latch plate, the locking portion is a limiting surface arranged opposite to the storage tray, the mounting base passes through the limiting groove, the spring drives the latch plate to move radially, and the limiting groove cooperates with the limiting 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 which is arranged on the end surface of the material storage tray and extends 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 arranged in the latch groove.

6. The material storage tray installation structure of the automatic bottom thread changing device according to claim 4 is 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 limiting groove to push the latch plate to move radially so that the mounting base passes through the limiting groove.

7. The material storage tray installation structure of the automatic bottom thread changing device according to claim 4 is characterized in that: The latch plate is connected with 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 is characterized in that: A cutting-proof hand pressing portion is provided at the radial outer end of the latch plate.

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 material storage tray is provided with a zero point positioning hole matched with the zero point positioning pin.

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

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