Needle replacing mechanism and dispensing machine

Abstract

The utility model provides a needle replacing mechanism and a dispensing machine. The needle replacing mechanism comprises a base, a needle sleeve fixing assembly, a needle head screwing assembly, a needle picking assembly and a needle carrying assembly. The needle sleeve fixing assembly is connected to the base and comprises a limiting clamping groove, and the limiting clamping groove limits the circumferential direction of the needle sleeve. The needle head screwing assembly comprises a first needle head clamping jaw part, a clamping jaw rotating part and a first clamping jaw translation part, and the first needle head clamping jaw part is used for clamping a needle head. The clamping jaw rotating part drives the first needle clamping jaw part to rotate, and relative screwing of the needle and the needle sleeve is achieved. The first clamping jaw translation component is connected to the base and drives the clamping jaw rotating component to move on the base. The needle picking assembly comprises a second needle head clamping jaw part, a third needle head clamping jaw part and a second clamping jaw translation part, the second needle head clamping jaw part clamps old needle heads on the first needle head clamping jaw part, and the third needle head clamping jaw part clamps new needle heads from the needle carrying assembly and sends the new needle heads to the first needle head clamping jaw part.

Description

Technical Field

[0001] The present application belongs to the technical field of glue dispensing equipment, and more specifically, relates to a needle changing mechanism and a glue dispensing machine. Background Art

[0002] Glue dispensing machine is a widely used equipment in industrial production. It is mainly used to accurately and quantitatively apply or drip glue, ink or other fluid materials on the surface of the workpiece to achieve sealing, fixing, coating and other process purposes. Due to its high precision and high efficiency, glue dispensing machine is widely used in many fields such as electronics, automobiles, medical treatment, aerospace, etc. The glue dispensing machine is generally driven by air pressure or mechanical means to suck glue from the glue storage barrel and transmit it to the glue dispensing needle through a pipeline. Under the precise control of the control system, the needle moves according to the preset trajectory and speed, and at the same time opens or closes the outflow of glue to achieve glue dripping or coating.

[0003] During the use of the dispensing machine, the state and performance of the needle directly affect the accuracy and effect of dispensing. As the working time increases, the needle may need to be replaced due to wear, blockage and other reasons. However, the traditional needle replacement process is usually cumbersome, requiring manual removal of the old needle, cleaning the dispensing machine, and installing the new needle. This process is not only complicated to operate, but also time-consuming, greatly reducing the working efficiency of the dispensing machine. This problem is particularly prominent in large-scale production and high-frequency needle replacement conditions. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a needle changing mechanism and a glue dispensing machine to solve the technical problems existing in the prior art of complicated needle changing process and low efficiency of manual needle changing.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] A needle replacement mechanism is provided for replacing a needle on a needle sleeve, comprising:

[0007] Pedestal;

[0008] A needle sleeve fixing assembly is connected to the base, and the needle sleeve fixing assembly includes a limiting slot. When the needle sleeve extends into the limiting slot, the limiting slot limits the circumference of the needle sleeve;

[0009] A needle screwing assembly, comprising a first needle clamping jaw component, a clamping jaw rotating component and a first clamping jaw translating component, wherein the first needle clamping jaw component is located on the side of the needle sleeve fixing assembly where the needle is located, so as to clamp the needle, the first needle clamping jaw component is connected to the clamping jaw rotating component, the clamping jaw rotating component is used to drive the first needle clamping jaw component to rotate, so as to drive the needle to be screwed relative to the needle sleeve, the clamping jaw rotating component is connected to the first clamping jaw translating component, the first clamping jaw translating component is used to drive the clamping jaw rotating component to move, and the first clamping jaw translating component is connected to the base;

[0010] The needle picking assembly comprises a second needle clamping jaw component, a third needle clamping jaw component and a second clamping jaw translation component, wherein the second needle clamping jaw component is used to clamp the old needle replaced by the first needle clamping jaw component, and the third needle clamping jaw component is used to clamp the new needle to the first needle clamping jaw component; the second clamping jaw translation component is connected to the base, the second needle clamping jaw component and the third needle clamping jaw component are both connected to the second clamping jaw translation component, and the second clamping jaw translation component is used to switch the second needle clamping jaw component or the third needle clamping jaw component to dock with the first needle clamping jaw component;

[0011] The needle-carrying assembly comprises a needle disk, which is detachably connected to the base and has a placement hole for placing the needle.

[0012] As a further improvement of the above technical solution:

[0013] Optionally, the needle sleeve fixing assembly includes limiting flaps arranged in pairs, the limiting flaps are arranged at intervals from each other, the limiting slot is the interval between the limiting flaps arranged in pairs, and when the needle sleeve extends into the limiting slot, the limiting flaps arranged in pairs are clamped on both sides of the needle sleeve.

[0014] Optionally, the first needle clamp component includes a clamp driving member, a clamp base and clamps arranged in pairs, the clamp base has a guide rail, the clamps arranged in pairs are slidably connected to the guide rail, and the clamp driving member is drivingly connected to the clamps to make the clamps arranged in pairs approach or move away from each other.

[0015] Optionally, the clamping jaw rotating component includes a rotating driving member, the clamping jaw base is connected to the rotating driving member, and the rotating driving member is used to drive the clamping jaw base to spirally rise and fall.

[0016] Optionally, the second clamping jaw translation component includes a lifting translation component and a transverse translation component, the second needle clamping jaw component and the third needle clamping jaw component are both connected to the lifting translation component, the lifting translation component is used to drive the second needle clamping jaw component and the third needle clamping jaw component to vertically approach or move away from the first needle clamping jaw component, the lifting translation component is connected to the transverse translation component, the transverse translation component is connected to the base, and the transverse translation component is used to drive the second needle clamping jaw component and the third needle clamping jaw component to move transversely between the first needle clamping jaw component and the needle carrier assembly.

[0017] Optionally, it also includes a needle detector, which is installed on the second needle clamping jaw component and the third needle clamping jaw component, and is used to detect whether a needle is clamped on the second needle clamping jaw component and the third needle clamping jaw component.

[0018] Optionally, the needle carrying assembly further comprises a waste needle dish, wherein the waste needle dish is connected to the base, and the old needles on the second needle clamping member are placed into the waste needle dish.

[0019] A glue dispensing machine comprises a glue dispensing mechanism and the above-mentioned needle changing mechanism; the glue dispensing mechanism comprises a glue dispensing moving component, a glue guide, a needle sleeve and a needle, the needle sleeve is connected to the glue dispensing moving component, and the glue dispensing moving component is used to drive the needle sleeve to move to a working position; one end of the glue guide is connected to a glue source, the other end of the glue guide is connected to the needle sleeve, and the needle head is detachably connected to the needle sleeve.

[0020] As a further improvement of the above technical solution:

[0021] Optionally, the glue dispensing machine also includes a glue removal mechanism, which is used to remove residual glue on the needle head. The glue removal mechanism includes a rotating glue brush and a glue brush driving component, and the glue brush driving component is used to drive the rotating glue brush to rotate; after the needle head is degummed by the glue removal mechanism, it is sent to the needle changing mechanism for needle changing.

[0022] Optionally, the dispensing machine further includes a needle calibration mechanism, wherein the needle calibration mechanism includes a first calibration lens and a second calibration lens, and the first calibration lens and the second calibration lens are arranged alternately with each other.

[0023] The beneficial effects of a needle replacement mechanism and a glue dispensing machine provided by the present application are:

[0024] The present application proposes a needle changing mechanism, including a base, a needle sleeve fixing assembly, a needle screwing assembly, a needle picking assembly and a needle carrying assembly. The needle sleeve fixing assembly is connected to the base, and the needle sleeve fixing assembly includes a limit slot, and the limit slot limits the circumference of the needle sleeve. The needle screwing assembly includes a first needle clamping jaw component, a clamping jaw rotating component and a first clamping jaw translation component, and the first needle clamping jaw component is used to clamp the needle. The clamping jaw rotating component is responsible for driving the first needle clamping jaw component to rotate, thereby realizing the relative screwing operation of the needle and the needle sleeve. The first clamping jaw translation component is connected to the base, and the first clamping jaw translation component is responsible for driving the entire clamping jaw rotating component to move on the base to ensure that the clamping jaw can accurately reach the working position. The needle picking assembly includes a second needle clamping jaw component, a third needle clamping jaw component and a second clamping jaw translation component. The second needle clamping jaw component is used to clamp the old needle replaced by the first needle clamping jaw component, while the third needle clamping jaw component is responsible for clamping the new needle from the needle carrying assembly and sending it to the first needle clamping jaw component. The second clamping jaw translation component is connected to the base. Through its precise control, the second needle clamping jaw component and the third needle clamping jaw component can be flexibly switched to dock with the first needle clamping jaw component, thereby efficiently completing the picking and placement of the needle. The needle carrying assembly is responsible for the storage and supply of needles. It includes a detachable needle tray, which is provided with a plurality of placement holes for placing needles, so that multiple needles can be placed on the needle tray. The needle tray can be conveniently connected to the base to provide a steady supply of new needles for the needle replacement process. After the needles on the needle tray are used up, the next needle tray can be replaced.

[0025] The present application provides a glue dispensing machine, comprising a glue dispensing mechanism and the above-mentioned needle replacement mechanism; the glue dispensing mechanism comprises a glue dispensing moving assembly, a glue guide, a needle sleeve and a needle, the needle sleeve is connected to the glue dispensing moving assembly, and the glue dispensing moving assembly is used to drive the needle sleeve to move to a working position; one end of the glue guide is connected to a glue source, and the other end of the glue guide is connected to the needle sleeve. In order to facilitate the replacement of the needle, the needle and the needle sleeve are detachably connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of the needle changing mechanism provided in this application;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of the glue dispensing mechanism of the glue dispensing machine provided in this application;

[0029] Figure 3A schematic diagram of the three-dimensional structure of the needle sleeve of the dispensing machine provided in this application;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of the needle sleeve fixing assembly and the needle screwing assembly of the needle changing mechanism provided in the present application;

[0031] Figure 5 A schematic diagram of the three-dimensional structure of the needle picking assembly of the needle changing mechanism provided in this application;

[0032] Figure 6 A schematic diagram of the three-dimensional structure of the needle-carrying assembly of the needle-changing mechanism provided in the present application;

[0033] Figure 7 A partially enlarged structural schematic diagram of the glue dispensing machine provided in this application;

[0034] Figure 8 A schematic diagram of the three-dimensional structure of the glue removal mechanism and needle calibration mechanism of the glue dispensing machine provided in this application;

[0035] Fig. 9 A schematic diagram of the three-dimensional structure of the dispensing machine provided in this application.

[0036] Among them, the reference numerals in the figure are:

[0037] 1. needle exchange mechanism; 11. base; 12. needle sleeve fixing assembly; 121. limit slot; 122. limit flap; 13. needle screw assembly; 131. first needle clamping jaw component; 1311. clamping jaw base; 1312. clamping jaw; 132. clamping jaw rotating component; 133. first clamping jaw translation component; 14. needle picking assembly; 141. second needle clamping jaw component; 142. third needle clamping jaw component; 143. The second clamping jaw translation component; 1431, the lifting and translation component; 1432, the lateral translation component; 15, the needle carrying assembly; 151, the needle plate; 152, the waste needle plate; 2, the needle sleeve; 3, the needle; 4, the needle detection component; 5, the glue dispensing mechanism; 51, the glue dispensing moving assembly; 52, the glue guiding component; 6, the glue removing mechanism; 61, the rotating glue brush; 7, the needle calibration mechanism; 8, the shell; 9, the material conveying line; 10, the robot arm. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] The present application aims to provide an efficient and convenient needle replacement mechanism, which is particularly suitable for the rapid replacement of the needle 3 on the needle sleeve 2 of the glue dispensing machine. Figures 1 to 6 As shown, the needle exchange mechanism provided by the present application includes a base 11, a needle sleeve fixing assembly 12, a needle screwing assembly 13, a needle picking assembly 14 and a needle carrying assembly 15. The base 11 serves as the foundation of the entire needle exchange mechanism, carrying other key components and providing a stable platform for their coordinated work.

[0043] The needle sleeve fixing assembly 12 is connected to the base 11, and the needle sleeve fixing assembly 12 includes a limiting slot 121. When the needle sleeve 2 extends into the limiting slot 121, the friction between the limiting slot 121 and the needle sleeve 2 is used to limit the circumference of the needle sleeve 2, thereby ensuring that the needle sleeve 2 remains stable and does not rotate during the needle replacement process.

[0044] The needle screwing assembly 13 is the key executor in the needle changing process. The needle screwing assembly 13 includes a first needle clamping jaw component 131, a clamping jaw rotating component 132 and a first clamping jaw translation component 133. The first needle clamping jaw component 131 is located on the needle sleeve fixing assembly 12, and is specially designed for the needle 3, and can firmly clamp the needle 3. The clamping jaw rotating component 132 is responsible for driving the first needle clamping jaw component 131 to rotate, thereby realizing the relative screwing operation of the needle 3 and the needle sleeve 2, whether it is to remove the old needle or install the new needle, it can be easily dealt with. The first clamping jaw translation component 133 is connected to the base 11, and the first clamping jaw translation component 133 is responsible for driving the entire clamping jaw rotating component 132 to move on the base 11 to ensure that the clamp can accurately reach the working position.

[0045] The needle picking assembly 14 includes a second needle clamping jaw component 141, a third needle clamping jaw component 142 and a second clamping jaw translation component 143. The second needle clamping jaw component 141 is used to clamp the old needle replaced by the first needle clamping jaw component 131, while the third needle clamping jaw component 142 is responsible for clamping the new needle from the needle carrying assembly 15 and delivering it to the first needle clamping jaw component 131. The second clamping jaw translation component 143 is connected to the base 11. Through its precise control, the second needle clamping jaw component 141 and the third needle clamping jaw component 142 can be flexibly switched to dock with the first needle clamping jaw component 131, thereby efficiently completing the picking and placement of the needle.

[0046] The needle carrier assembly 15 is responsible for storing and supplying the needles 3, and includes a detachable needle tray 151, on which a plurality of placement holes for placing the needles 3 are provided, so that a plurality of needles 3 can be placed on the needle tray 151. The needle tray 151 can be conveniently connected to the base 11 to provide a continuous supply of new needles for the needle replacement process. When the needles 3 on the needle tray 151 are used up, the next needle tray 151 can be replaced.

[0047] When replacing the needle 3, the working process of the needle changing mechanism is as follows: first, the needle sleeve 2 with the old needle is extended into the limiting slot 121, so that the needle sleeve 2 is fixed on the limiting slot 121; then, the first needle clamping claw component 131 moves to the bottom of the needle 3, clamps the needle, and loosens and removes it from the needle sleeve 2 through the clamping claw rotating component 132; then, the first clamping claw translation component 133 moves the old needle to the bottom of the needle picking assembly 14, and the second needle clamping claw component 141 extends to the upper end of the old needle, clamps the old needle and then discards it; at the same time, the third needle clamping claw component 142 clamps a new needle from the needle disk of the needle carrying assembly 15 and sends it to the first needle clamping claw component 131; then, the first clamping claw translation component 133 drives the new needle to move to the bottom of the needle sleeve 2 and screws it into the needle sleeve 2; finally, the needle sleeve 2 is pulled out from the limiting slot 121, completing the entire needle changing process.

[0048] like Figure 4 As shown, in one embodiment of the present application, the needle sleeve fixing assembly 12 includes limiting flaps 122 arranged in pairs, and the limiting flaps 122 are arranged at intervals from each other, and the gaps between these limiting flaps 122 form limiting slots 121. When the needle sleeve 2 extends into the limiting slot 121, the limiting flaps 122 arranged in pairs can be firmly clamped on both sides of the needle sleeve 2, ensuring that the needle sleeve 2 remains stable and does not rotate during the needle replacement process. It is worth mentioning that in order to further improve the stability of clamping and avoid damage to the needle sleeve 2, a soft rubber layer is specially provided on the side of the limiting flap 122 that contacts the needle sleeve 2. The soft rubber layer not only has excellent friction and can fit the needle sleeve 2 more closely, but also has a certain elasticity, which can play a buffering role during the clamping process, and effectively prevents scratches or deformation of the needle sleeve 2 caused by clamping too tightly.

[0049] like Figure 4 As shown, in one embodiment of the present application, the first needle clamping jaw component 131 includes a clamping jaw driving member, a clamping jaw base 1311 and clamping jaws 1312 arranged in pairs, the clamping jaw base 1311 is provided with a guide rail, the clamping jaws 1312 arranged in pairs are slidably connected to the guide rail, and the clamping jaw driving member is drivingly connected to the clamping jaws 1312. The clamping jaw driving member serves as a power source for the clamping action, and the clamping jaw driving member is drivingly connected to the clamping jaws 1312. When the clamping jaw driving member receives a clamping instruction, it drives the clamping jaws 1312 arranged in pairs to move closer to each other, thereby clamping the needle 3; similarly, when the clamping jaw driving member receives a release instruction, the clamping jaw driving member drives the clamping jaws 1312 to move in the opposite direction, and the clamping jaws 1312 arranged in pairs move away from each other, thereby releasing the needle 3.

[0050] In the needle picking assembly 14 , the structures of the second needle clamping jaw component 141 and the third needle clamping jaw component 142 are substantially similar to the structure of the first needle clamping jaw component 131 , and thus will not be described in detail.

[0051] like Figure 4 As shown, in one embodiment of the present application, the jaw rotating component 132 includes a rotating driving member, and the jaw base 1311 is connected to the rotating driving member, and the rotating driving member is used to drive the jaw base 1311 to spirally rise and fall. Specifically, the rotating driving member can be a servo motor or a stepping motor, which ensures that the jaw base 1311 can rotate according to a predetermined screwing angle and speed with its high efficiency and stable performance. When the rotating driving member starts to work, the jaw base 1311 can perform a vertical lifting movement while rotating, that is, the jaw base 1311 is spirally lifted. This composite motion mode enables the jaw base 1311 to drive the needle 3 to smoothly enter the needle sleeve 2, or remove the needle 3 from the needle sleeve 2.

[0052] like Figure 5As shown, in one embodiment of the present application, the second clamping jaw translation component 143 includes a lifting translation component 1431 and a lateral translation component 1432. Through the coordinated work of the lifting translation component 1431 and the lateral translation component 1432, the second needle clamping jaw component 141 and the third needle clamping jaw component 142 can be flexibly moved in three-dimensional space.

[0053] Specifically, the second needle clamping jaw component 141 and the third needle clamping jaw component 142 are each connected to a lifting and translating component 1431, and the lifting and translating component 1431 drives the second needle clamping jaw component 141 and the third needle clamping jaw component 142 to lift and lower, so as to drive the second needle clamping jaw component 141 and the third needle clamping jaw component 142 to approach or depart from the first needle clamping jaw component 131 in the vertical direction. The lifting and translating component 1431 can be implemented in a variety of ways such as a screw guide, a linear motor, a hydraulic / pneumatic cylinder, etc., to meet the needs of different application scenarios.

[0054] The lifting translation component 1431 is connected to the lateral translation component 1432, and the lateral translation component 1432 is connected to the base 11. The lateral translation component 1432 drives the second needle clamping component 141 and the third needle clamping component 142 to move between the first needle clamping component 131 and the needle carrier assembly 15 with its lateral driving force. Similarly, the lateral translation component 1432 can also adopt a variety of methods such as a screw guide, a linear motor, a hydraulic / pneumatic cylinder, etc. to meet the needs of different working environments.

[0055] The second clamping jaw translation component 143 can accurately adjust the positions of the second needle clamping jaw component 141 and the third needle clamping jaw component 142 as needed. Whether it is lifting or lateral movement, it can be completed quickly and accurately, which not only improves the degree of automation of the needle changing process, but also reduces the complexity and error rate of manual operation, providing a strong guarantee for the stable operation of the dispensing machine.

[0056] In one embodiment of the present application, the structure of the first jaw translation component 133 is similar to that of the second jaw translation component 143 , but the first jaw translation component 133 generally only needs to be provided with a lateral translation component to meet the movement requirements of the needle 3 .

[0057] like Figure 5As shown, in one embodiment of the present application, a needle detection part 4 is also included. The needle detection part 4 is installed on the second needle clamping jaw part 141 and the third needle clamping jaw part 142. The needle detection part 4 is used to detect whether the second needle clamping jaw part 141 and the third needle clamping jaw part 142 clamp the needle 3. Specifically, the needle detection part 4 can be an infrared probe, which can accurately detect whether the second needle clamping jaw part 141 and the third needle clamping jaw part 142 clamp the needle 3 with its excellent detection ability. Once the clamping jaw part successfully clamps the needle, the infrared probe can sense this change and transmit the corresponding signal to the control end, thereby ensuring that the system knows the current clamping state of the needle, effectively avoiding problems such as misoperation of the clamping jaw, and thus ensuring the stable operation and efficient production of the dispensing machine.

[0058] like Figure 6 As shown, in one embodiment of the present application, the needle carrier assembly 15 further includes a waste needle dish 152, which is connected to the base 11. When the second needle clamping jaw component 141 completes its task of clamping the old needle 3, it is necessary to perform the release action. At this time, the second needle clamping jaw component 141 will accurately release the old needle 3 into the waste needle dish 152. The design of the waste needle dish 152 fully considers the size and shape of the needle, ensuring that the old needle can fall into it smoothly and safely.

[0059] like Figures 7 to 9 As shown, the present application also provides a glue dispensing machine, including a glue dispensing mechanism 5 and the needle changing mechanism 1 in the above embodiment; the glue dispensing mechanism 5 includes a glue dispensing moving component 51, a glue guide 52, a needle sleeve 2 and a needle 3, the needle sleeve 2 is connected to the glue dispensing moving component 51, and the glue dispensing moving component 51 is used to drive the needle sleeve 2 to move to the working position; specifically, the glue dispensing moving component 51 also includes a lifting translation component and a lateral translation component, through the coordinated work of the lifting translation component and the lateral translation component, the needle sleeve 2 and the needle 3 are driven to move to the glue dispensing area for glue dispensing, or the needle sleeve 2 and the needle 3 are driven to move to the needle changing mechanism 1 to replace the needle 3. One end of the glue guide 52 is connected to the glue source, and the other end of the glue guide 52 is connected to the needle sleeve 2, thereby establishing a smooth passage for glue from the glue source to the needle sleeve 2, ensuring a continuous supply of glue. In order to facilitate the replacement of the needle 3, the needle 3 is detachably connected to the needle sleeve 2. Specifically, the tail of the needle 3 is provided with a thread, and a screw hole is correspondingly provided on the needle cover 2. The needle 3 and the needle cover 2 can be connected or separated by screwing the needle changing mechanism 1.

[0060] like Figure 8As shown, in one embodiment of the present application, the glue dispensing machine further includes a glue removal mechanism 6, which is used to remove the residual glue on the needle 3. The glue removal mechanism 6 includes a rotating glue brush 61 and a glue brush driving member. The bristles of the rotating glue brush 61 can closely fit the surface of the needle 3 during rotation, thereby effectively removing the attached residual glue. The glue brush driving member is responsible for driving the rotating glue brush 61 to rotate.

[0061] When the needle 3 completes the glue dispensing task, it will be sent to the glue removal mechanism 6 for residual glue removal. Driven by the glue brush driving member, the rotating glue brush 61 starts to rotate, and its bristles contact the surface of the needle 3 to remove the residual glue attached one by one. After being processed by the glue removal mechanism 6, the surface of the needle 3 becomes clean and tidy, ready for subsequent glue dispensing tasks or needle replacement operations.

[0062] like Figure 8 As shown, in one embodiment of the present application, the dispensing machine also includes a needle calibration mechanism 7, and the needle calibration mechanism 7 includes a first calibration lens and a second calibration lens. The two calibration lenses are not simply placed side by side, but are arranged alternately from two directions. Through the coordinated work of the first calibration lens and the second calibration lens, the dispensing machine realizes the function of binocular calibration. The principle of binocular calibration is based on binocular vision technology. The image information of the needle is obtained through the different viewing angles of the two calibration lenses, and then the information is compared and analyzed to accurately determine the position and posture of the needle. This calibration method is not only fast, but also highly accurate. It can ensure that the needle can accurately reach the predetermined position in each dispensing operation, greatly improving the accuracy and consistency of dispensing.

[0063] like Figures 7 to 9 As shown, in one embodiment of the present application, the dispensing machine also includes a housing 8, a material conveying line 9, and a mechanical arm 10. Among them, the housing, as the external structure of the dispensing machine, not only provides the necessary protection, but also ensures the stable operation of the internal components. The material conveying line is a key component for realizing the automatic transmission of materials. It can accurately and quickly transfer the workpiece to be dispensed to the material picking station, thereby greatly improving the production efficiency. In addition, the mechanical arm can transport the workpiece to be dispensed from the material picking station to the dispensing station, and the dispensing mechanism 5 performs dispensing; at the same time, it can also move the workpiece that has been dispensed from the dispensing station to the unloading station. The introduction of the mechanical arm improves the operating ability of the dispensing machine. By controlling the motion trajectory of the mechanical arm, the dispensing machine can easily cope with various complex dispensing tasks and achieve high-precision dispensing operations. The collaborative work of these components enables the dispensing machine to have stronger applicability and flexibility while maintaining high performance, providing great convenience for the user's production.

[0064] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A needle replacement mechanism, used for replacing a needle (3) on a needle sleeve (2), characterized in that: include: Base (11); A needle sleeve fixing assembly (12) is connected to the base (11), the needle sleeve fixing assembly (12) comprising a limiting card slot (121), and when the needle sleeve (2) extends into the limiting card slot (121), the limiting card slot (121) limits the circumference of the needle sleeve (2); A needle screwing assembly (13), comprising a first needle clamping jaw component (131), a clamping jaw rotating component (132) and a first clamping jaw translating component (133), wherein the first needle clamping jaw component (131) is located on a side of the needle sleeve fixing assembly (12) where the needle (3) is located, so as to clamp the needle (3), the first needle clamping jaw component (131) is connected to the clamping jaw rotating component (132), the clamping jaw rotating component (132) is used to drive the first needle clamping jaw component (131) to rotate, so as to drive the needle (3) to be screwed relative to the needle sleeve (2), the clamping jaw rotating component (132) is connected to the first clamping jaw translating component (133), the first clamping jaw translating component (133) is used to drive the clamping jaw rotating component (132) to move, and the first clamping jaw translating component (133) is connected to the base (11); The needle picking assembly (14) comprises a second needle clamping jaw component (141), a third needle clamping jaw component (142) and a second clamping jaw translation component (143), wherein the second needle clamping jaw component (141) is used to clamp an old needle that has been replaced from the first needle clamping jaw component (131), and the third needle clamping jaw component (142) is used to clamp a new needle to the first needle clamping jaw component (131); the second clamping jaw translation component (143) is connected to the base (11), the second needle clamping jaw component (141) and the third needle clamping jaw component (142) are both connected to the second clamping jaw translation component (143), and the second clamping jaw translation component (143) is used to switch the second needle clamping jaw component (141) or the third needle clamping jaw component (142) to dock with the first needle clamping jaw component (131); The needle carrier assembly (15) comprises a needle disk (151), wherein the needle disk (151) is detachably connected to the base (11), and the needle disk (151) has a placement hole for placing a needle (3).

2. The needle changing mechanism according to claim 1, characterized in that: The needle sleeve fixing assembly (12) comprises limiting flaps (122) arranged in pairs, the limiting flaps (122) are arranged at intervals from each other, the limiting groove (121) is the interval between the limiting flaps (122) arranged in pairs, and when the needle sleeve (2) extends into the limiting groove (121), the limiting flaps (122) arranged in pairs are clamped on both sides of the needle sleeve (2).

3. The needle changing mechanism according to claim 1, characterized in that: The first needle clamping jaw component (131) includes a clamping jaw driving member, a clamping jaw base (1311) and clamping jaws (1312) arranged in pairs, wherein the clamping jaw base (1311) has a guide rail, and the clamping jaws (1312) arranged in pairs are slidably connected to the guide rail, and the clamping jaw driving member is drivingly connected to the clamping jaws (1312) so that the clamping jaws (1312) arranged in pairs are close to or away from each other.

4. The needle changing mechanism according to claim 3, characterized in that: The clamping jaw rotating component (132) comprises a rotating driving member, the clamping jaw base (1311) is connected to the rotating driving member, and the rotating driving member is used to drive the clamping jaw base (1311) to spirally rise and fall.

5. The needle changing mechanism according to claim 1, characterized in that: The second clamping jaw translation component (143) comprises a lifting and translation component (1431) and a transverse translation component (1432); the second needle clamping jaw component (141) and the third needle clamping jaw component (142) are both connected to the lifting and translation component (1431); the lifting and translation component (1431) is used to drive the second needle clamping jaw component (141) and the third needle clamping jaw component (142) to vertically approach or move away from the first needle clamping jaw component (131); the lifting and translation component (1431) is connected to the transverse translation component (1432); the transverse translation component (1432) is connected to the base (11); the transverse translation component (1432) is used to drive the second needle clamping jaw component (141) and the third needle clamping jaw component (142) to move transversely between the first needle clamping jaw component (131) and the needle carrier assembly (15).

6. The needle changing mechanism according to claim 1, characterized in that: The invention also comprises a needle detection part (4), wherein the needle detection part (4) is mounted on the second needle clamping jaw part (141) and the third needle clamping jaw part (142), and the needle detection part (4) is used to detect whether a needle (3) is clamped on the second needle clamping jaw part (141) and the third needle clamping jaw part (142).

7. The needle changing mechanism according to claim 1, characterized in that: The needle carrying assembly (15) further comprises a waste needle dish (152), wherein the waste needle dish (152) is connected to the base (11), and the old needles (3) on the second needle clamping jaw component (141) are placed into the waste needle dish (152).

8. A glue dispensing machine, characterized in that: It comprises a glue dispensing mechanism (5) and a needle changing mechanism (1) as claimed in any one of claims 1 to 7; the glue dispensing mechanism (5) comprises a glue dispensing moving component (51), a glue guide (52), a needle sleeve (2) and a needle (3); the needle sleeve (2) is connected to the glue dispensing moving component (51); the glue dispensing moving component (51) is used to drive the needle sleeve (2) to move to a working position; one end of the glue guide (52) is connected to a glue source, and the other end of the glue guide (52) is connected to the needle sleeve (2); the needle (3) is detachably connected to the needle sleeve (2).

9. The glue dispensing machine according to claim 8, characterized in that: The invention comprises a glue removal mechanism (6), wherein the glue removal mechanism (6) is used to remove residual glue on the needle head (3), and the glue removal mechanism (6) comprises a rotating glue brush (61) and a glue brush driving member, wherein the glue brush driving member is used to drive the rotating glue brush (61) to rotate; after the glue is removed by the glue removal mechanism (6), the needle head (3) is sent to the needle replacement mechanism (1) for needle replacement.

10. The glue dispensing machine according to claim 8, characterized in that: The invention comprises a needle calibration mechanism (7), wherein the needle calibration mechanism (7) comprises a first calibration lens and a second calibration lens, wherein the first calibration lens and the second calibration lens are arranged alternately with each other.

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