A glue needle calibration device

Abstract

This utility model provides a glue needle calibration device, relating to the field of glue needle calibration. The glue needle calibration device includes a driving component, a module adapter, a pressure sensor, and a dispensing module. The module adapter is connected to the driving end of the driving component 1. The pressure sensor includes an elastic element capable of deformation, which is connected to the module adapter. The dispensing module includes a dispensing structure and a clamping structure for holding the dispensing structure. The glue needle of the dispensing structure can touch a preset reference surface. The clamping structure is connected to the elastic element. When the glue needle of the dispensing structure touches the preset reference surface, the relative position between the dispensing module and the module adapter changes, the elastic element deforms and generates a pressure signal, and the driving component controls the module adapter to stop moving according to the pressure signal, so that the glue needle is in the calibration position.

Description

Technical Field

[0001] This utility model belongs to the field of glue needle calibration technology, and in particular relates to a glue needle calibration device. Background Technology

[0002] In actual dispensing processes, the length of the glue needle often deviates. If the height between the glue needle tip and the dispensing position is not precisely controlled, the amount of glue dispensed cannot be effectively controlled, ultimately leading to quality problems. Therefore, glue needle calibration is necessary for different glue needles, which means re-determining the dispensing stroke.

[0003] In existing technologies, manual calibration is mostly used to calibrate glue needles. Specifically, the operator first installs the glue needle onto the dispensing structure, then starts the equipment, allowing the needle to slowly descend. Simultaneously, the relative position of the needle tip to a preset reference surface (such as the simulated surface of the workpiece to be dispensed or the surface of a calibration block) is visually observed. When it is determined that the needle tip is about to contact the reference surface, the equipment is manually stopped, and the mechanical position at this moment is recorded as the calibration reference, thereby resetting the start or end point parameters of the dispensing stroke.

[0004] However, this manual calibration method has significant drawbacks. Firstly, it relies on the operator's visual judgment and manual operation, making the calibration accuracy highly dependent on experience and skill level, which is insufficient for high-precision dispensing. Secondly, the calibration process must be repeated every time the glue needle is changed, making it cumbersome and time-consuming, severely impacting production efficiency. These shortcomings are particularly pronounced in mass production scenarios. Utility Model Content

[0005] In view of this, the present invention provides a glue needle calibration device, which aims to improve the accuracy of glue needle calibration and the convenience of operation.

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

[0007] This utility model provides a glue needle calibration device, including a driving component, a module adapter, a driving end connected to the driving component, a pressure sensor including an elastic element capable of deformation, the elastic element being connected to the module adapter; and a dispensing module including a dispensing structure and a clamping structure for holding the dispensing structure, wherein the glue needle of the dispensing structure can touch a preset reference surface; the clamping structure is connected to the elastic element; wherein, when the glue needle of the dispensing structure touches the preset reference surface, the relative position between the dispensing module and the module adapter changes, the elastic element deforms and generates a pressure signal, and the driving component controls the module adapter to stop moving according to the pressure signal, so that the glue needle is located in the calibration position.

[0008] In one embodiment, the driving end of the driving member drives the module adapter to move in the vertical direction; the module adapter is slidably connected to the clamping structure in the vertical direction.

[0009] In one embodiment, in the vertical direction, the elastic element is an elastic plate, the elastic plate having a first connecting end and a second connecting end opposite to each other; the first connecting end is fixedly connected to the clamping structure, and the second connecting end is fixedly connected to the module adapter.

[0010] In one embodiment, the elastic plate has a hollow portion, a first opening is formed on the side of the first connecting end, and a second opening is formed on the side of the second connecting end. The first opening and the second opening are respectively connected to the hollow portion.

[0011] In one embodiment, the module adapter is provided with a first slide rail extending along the vertical direction, and the clamping structure is provided with a first slide groove extending along the vertical direction, wherein the first slide rail is slidably connected to the first slide groove.

[0012] In one embodiment, the fixed end of the drive member is provided with a linear module having a second slide rail extending along the vertical direction, and the module adapter is provided with a second slide groove extending along the vertical direction, and the second slide rail is slidably connected to the second slide groove.

[0013] In one embodiment, the clamping structure includes a first clamping plate, a second clamping plate, and a connecting assembly passing through the first clamping plate and the second clamping plate; the first clamping plate has a first arc surface, the second clamping plate has a second arc surface, and the first arc surface and the second arc surface together clamp the glue cylinder of the dispensing structure; the second clamping plate is connected to the pressure sensor.

[0014] In one embodiment, the connecting assembly includes: a butterfly plate having a plurality of circumferentially arranged wings; a plurality of connecting posts, each of which is disposed on a wing of the butterfly plate and fixedly connected to the second clamping plate; and a butterfly screw penetrating and screwed into the butterfly plate and abutting against the first clamping plate; wherein the butterfly screw is movable in a horizontal direction to loosen or tighten the first clamping plate.

[0015] In one embodiment, the connecting assembly further includes a plurality of guide posts disposed between the butterfly plate and the second clamping plate, each guide post passing through the first clamping plate so that the first clamping plate can move along the guide posts.

[0016] In one embodiment, a positioning seat is provided at the bottom end of the first clamping plate, the glue needle passes through the positioning seat, and the bottom end of the glue tube abuts against the positioning seat.

[0017] This embodiment of the invention uses the elastic element of the pressure sensor as the connection medium between the module adapter and the dispensing module. It utilizes the relative displacement caused by the glue needle touching the reference surface to deform the elastic element and generate a pressure signal, thus achieving automatic triggering and stopping control of the calibration process. Compared to traditional manual calibration, this design not only eliminates errors caused by human visual judgment and manual operation, meeting the requirements of high-precision dispensing scenarios, but also automatically completes the calibration process after glue needle replacement, significantly improving production efficiency, especially suitable for scenarios with frequent glue needle changes in mass production. Simultaneously, the real-time feedback mechanism of the pressure sensor 3 avoids rigid collisions between the glue needle and the reference surface, reducing the risk of glue needle damage and extending the service life of the component. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 An overall structural diagram of an embodiment of the glue needle calibration device provided by this utility model;

[0020] Figure 2 for Figure 1 Exploded view of the gel needle calibration device;

[0021] Figure 3 for Figure 1 A structural diagram of the pressure sensor in the diagram;

[0022] Figure 4 for Figure 1 First-view structural diagram of the dispensing module;

[0023] Figure 5 for Figure 1 Second-view structural diagram of the dispensing module.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Driving component; 11. Driving end; 12. Fixed end; 13. Linear module; 131. Second slide rail; 2. Module adapter; 21. First slide rail; 22. Second slide groove; 3. Pressure sensor; 31. Elastic element; 311. First connecting end; 3111. First opening; 312. Second connecting end; 3121. Second opening; 4. Dispensing module; 41. Dispensing structure; 411. Glue needle; 412. Glue tube; 42. Clamping structure; 421. First clamping plate; 422. Second clamping plate; 423. Connecting assembly; 4231. Butterfly plate; 4232. Connecting post; 4233. Butterfly screw; 4234. Guide post; 424. Positioning seat; 425. First slide groove; 426. Spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. "Multiple" refers to two or more. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] In actual dispensing processes, the length of the glue needle often deviates. If the height between the glue needle tip and the dispensing position is not precisely controlled, the amount of glue dispensed cannot be effectively controlled, ultimately leading to quality problems. Therefore, glue needle calibration is necessary for different glue needles, which means re-determining the dispensing stroke.

[0030] In existing technologies, manual calibration is mostly used to calibrate glue needles. Specifically, the operator first installs the glue needle onto the dispensing structure, then starts the equipment, allowing the needle to slowly descend. Simultaneously, the relative position of the needle tip to a preset reference surface (such as the simulated surface of the workpiece to be dispensed or the surface of a calibration block) is visually observed. When it is determined that the needle tip is about to contact the reference surface, the equipment is manually stopped, and the mechanical position at this moment is recorded as the calibration reference, thereby resetting the start or end point parameters of the dispensing stroke.

[0031] However, this manual calibration method has significant drawbacks. Firstly, it relies on the operator's visual judgment and manual operation, making the calibration accuracy highly dependent on experience and skill level, which is insufficient for high-precision dispensing. Secondly, the calibration process must be repeated every time the glue needle is changed, making it cumbersome and time-consuming, severely impacting production efficiency. These shortcomings are particularly pronounced in mass production scenarios.

[0032] In view of this, the present invention provides a glue needle calibration device, which aims to improve the accuracy of glue needle calibration and the convenience of operation.

[0033] Please see Figure 1 and Figure 2 The glue needle calibration device includes a drive unit 1, a module adapter 2, a pressure sensor 3, and a dispensing module 4, wherein:

[0034] The driving component 1 is used to provide power to drive the movement of various components. Specifically, it can be a servo motor, a drive cylinder, or a stepper motor, etc. Its driving end 11 can output linear motion in a preset direction (such as the vertical direction).

[0035] The module adapter 2 is connected to the drive end 11 of the drive component 1 and can move together with the drive end 11. The main function of the module adapter 2 is to realize the connection and force transmission between the drive component 1 and the pressure sensor 3. Its structural design must ensure that it can stably support the weight of the pressure sensor 3 and the dispensing module 4 during movement and ensure the accuracy of force transmission.

[0036] The pressure sensor 3 includes an elastic element 31 capable of deformation, which is connected to the module adapter 2. The pressure sensor 3 can be of the S-type tensile pressure sensor type, beam sensor type, etc., and its core function is to sense pressure changes through the deformation of the elastic element 31. When the elastic element 31 is subjected to an external force, it undergoes a slight shape change, causing a change in resistance in the internal strain gauge, thus converting the physical deformation into a measurable electrical signal, i.e., a pressure signal.

[0037] The dispensing module 4 includes a dispensing structure 41 and a clamping structure 42. The glue needle 411 of the dispensing structure 41 is the component that directly performs the dispensing operation, and its end can accurately touch the preset reference surface. The clamping structure 42 is used to firmly clamp the dispensing structure 41 to ensure that the position of the glue needle 411 is stable during the dispensing process. The clamping structure 42 is connected to the elastic element 31, so that the entire dispensing module 4 can be elastically connected to the module adapter 2 through the elastic element 31.

[0038] During the calibration process of the glue needle 411, the driving component 1 drives the module adapter 2 to move the pressure sensor 3 and the dispensing module 4 as a whole towards the preset reference surface. When the glue needle 411 of the dispensing structure 41 touches the preset reference surface, the dispensing module 4 cannot continue to move with the module adapter 2 due to the obstruction of the reference surface. At this time, the module adapter 2 continues to move under the action of the driving component 1, resulting in a relative position change between the dispensing module 4 and the module adapter 2. This relative movement causes the elastic element 31 connecting the two to be compressed or stretched and deformed. The pressure sensor 3 converts this deformation into a pressure signal and transmits it to the control system. After receiving the pressure signal, the control system determines that the glue needle 411 has contacted the reference surface, and then controls the driving component 1 to stop driving the module adapter 2 to move. The position of the glue needle 411 at this time is the calibration position. The control system records the position parameters and completes the calibration process.

[0039] The glue needle calibration device provided in this embodiment includes a driving component 1, a module adapter 2, a pressure sensor 3, and a dispensing module 4. The module adapter 2 is connected to the driving end 11 of the driving component 1. The pressure sensor 3 includes an elastic element 31 capable of deformation, which is connected to the module adapter 2. The dispensing module 4 includes a dispensing structure 41 and a clamping structure 42 for holding the dispensing structure 41. The glue needle 411 of the dispensing structure 41 can touch a preset reference surface. The clamping structure 42 is connected to the elastic element 31. When the glue needle 411 of the dispensing structure 41 touches the preset reference surface, the relative position between the dispensing module 4 and the module adapter 2 changes, the elastic element 31 deforms and generates a pressure signal, and the driving component 1 controls the module adapter 2 to stop moving according to the pressure signal so that the glue needle 411 is in the calibration position. This embodiment of the invention uses the elastic element 31 of the pressure sensor 3 as the connection medium between the module adapter 2 and the dispensing module 4. The relative displacement caused by the glue needle 411 touching the reference surface deforms the elastic element 31 and generates a pressure signal, thus achieving automatic triggering and stopping control of the calibration process. Compared to traditional manual calibration, this design not only eliminates errors caused by human visual judgment and manual operation, meeting the requirements of high-precision dispensing scenarios, but also automatically completes the calibration process after the glue needle 411 is replaced, significantly improving production efficiency, especially suitable for scenarios where glue needles 411 are frequently replaced in mass production. Simultaneously, the real-time feedback mechanism of the pressure sensor 3 avoids rigid collisions between the glue needle 411 and the reference surface, reducing the risk of damage to the glue needle 411 and extending the service life of the component.

[0040] In some embodiments, please continue reading Figure 1 and Figure 2 Considering that the adhesive in the dispensing structure 41 is usually dispensed onto the workpiece surface by gravity, and that in actual dispensing operations, the glue needle 411 usually moves from top to bottom, the driving end 11 of the driving component 1 drives the module adapter 2 to move in the vertical direction, and the module adapter 2 slides in the vertical direction with the clamping structure 42.

[0041] The clamping structure 42 may have a guide rail extending vertically, and the module adapter 2 may have a corresponding slider adapted to the guide rail. The slider is fitted into the guide rail and can slide along the length of the guide rail. Alternatively, the clamping structure 42 may have a vertical guide hole, and the module adapter 2 may have a guide post passing through the guide hole. The guide post and the guide hole are clearance-fitted to achieve sliding guidance. The driving end 11 of the driving component 1 may be connected to the module adapter 2 via a ball screw pair. That is, the output shaft of the servo motor is connected to the screw, and the module adapter 2 is fixedly connected to a nut that mates with the screw. When the motor drives the screw to rotate, the nut drives the module adapter 2 to move linearly along the screw axis (vertical direction). Alternatively, the module adapter 2 may be directly driven by a linear motor to achieve reciprocating motion in the vertical direction.

[0042] In this embodiment of the invention, the cooperation between the guide rail or guide post and the slider (or guide hole) restricts the movement trajectory of the module adapter 2, allowing it to move only in the vertical direction. This prevents the horizontal offset or tilting of the module adapter 2 during calibration from affecting the alignment accuracy between the glue needle 411 and the preset reference surface, ensuring that the force exerted by the glue needle 411 when it touches the reference surface is accurately transmitted to the elastic element 31 of the pressure sensor 3, thus ensuring the accuracy of the pressure signal. Simultaneously, the drive unit 1 employs a servo motor coupled with a ball screw pair (or linear motor) to achieve high-precision displacement control of the module adapter 2. Combined with the micro-deformation detection capability of the pressure sensor 3, it can precisely control the instantaneous state of the glue needle 411 when it touches the reference surface, further improving calibration accuracy.

[0043] In some embodiments, please refer to Figure 2 and Figure 3 To facilitate installation, the pressure sensor 3 has been optimized. Specifically, in the vertical direction, the elastic element 31 includes an elastic plate with a first connecting end 311 and a second connecting end 312. The first connecting end 311 is fixedly connected to the clamping structure 42, and the second connecting end 312 is fixedly connected to the module adapter 2.

[0044] The first connecting end 311 and the second connecting end 312 may be provided with connecting holes, and are respectively fastened to the clamping structure 42 and the module adapter 2 by bolts, thus completing the installation of the pressure sensor 3. Since only two connecting ends are needed to install the elastic plate between the clamping structure 42 and the module adapter 2, it is very convenient.

[0045] In some embodiments, please refer to Figure 3 To reduce local stress concentration, the elastic plate of the pressure sensor 3 was optimized. Specifically, the elastic plate has a hollow portion, a first opening 3111 is formed on the side of the first connecting end 311, and a second opening 3121 is formed on the side of the second connecting end 312. The first opening 3111 and the second opening 3121 are respectively connected to the hollow portion.

[0046] The hollowed-out portion can be rectangular, waist-shaped, or other regular shapes, and is located in the central area of ​​the elastic plate. Its area accounts for 30%-50% of the total area of ​​the elastic plate, ensuring the overall structural stability of the elastic plate while providing sufficient space for deformation. The first opening 3111 and the second opening 3121 are located on the side of the first connecting end 311 and the second connecting end 312 away from the bending apex of the elastic plate, respectively. The width of the opening is slightly smaller than the width of the hollowed-out portion, and the edges adopt a rounded transition design to avoid stress concentration. For example, when the elastic plate is S-shaped, the hollowed-out portion can extend along the direction of the S-curve, or it can take the form of multiple through holes as shown in the figure. The first opening 3111 and the second opening 3121 smoothly transition from the sides of the first connecting end 311 and the second connecting end 312 to the hollowed-out portion, respectively, forming a continuous force transmission channel.

[0047] The hollowed-out portion in this embodiment of the invention reduces the overall stiffness of the elastic plate, allowing it to deform more under the same relative force, thereby improving the strain gauge's sensitivity to minute force changes. The connection between the first opening 3111 and the second opening 3121 and the hollowed-out portion guides the distribution of stress within the elastic plate, concentrating deformation primarily in the hollowed-out portion and the area surrounding the openings, reducing deformation suppression caused by excessive rigidity at the connecting ends. When the adhesive needle 411 touches the reference surface, triggering relative movement between the first connecting end 311 and the second connecting end 312, the hollowed-out portion amplifies the deformation effect through its own contraction or expansion. The first opening 3111 and the second opening 3121 further release the constraints of the connecting ends, allowing the elastic plate to deform more smoothly and uniformly, ensuring that the strain gauge can stably capture the deformation signal and convert it into a clear pressure signal.

[0048] In some embodiments, please refer to Figure 1 and Figure 5 To ensure that the relative movement between the clamping structure 42 and the module adapter 2 is vertical, and to maintain the vertical deformation direction of the elastic plate, thus preventing horizontal deviation from causing twisting deformation of the elastic plate and affecting the accuracy of the pressure signal, vertical guiding settings are implemented for both the clamping structure 42 and the module adapter 2. Specifically, the module adapter 2 is provided with a first slide rail 21 extending vertically, and the clamping structure 42 is provided with a first slide groove 425 extending vertically, with the first slide rail 21 slidably connected to the first slide groove 425.

[0049] The first slide rail 21 can be designed as a T-shaped or dovetail-shaped protrusion, extending vertically along the side of the module adapter 2, with a length not less than the maximum deformation stroke of the elastic plate to ensure that the fit is maintained during relative movement. The first slide groove 425 is a corresponding T-shaped or dovetail-shaped groove, which is formed on the corresponding side of the clamping structure 42.

[0050] In this embodiment of the invention, the slide rail and groove mechanism mechanically constrains the relative motion trajectory of the module adapter 2 and the clamping structure 42, ensuring that they can only undergo relative displacement in the vertical direction and cannot deviate or rotate in the horizontal direction (such as the X-axis or Y-axis). When the glue needle 411 touches the reference surface and causes deformation of the elastic plate, this guiding structure ensures that the force on the elastic plate is transmitted entirely in the vertical direction, and the deformation only occurs in the vertical plane (such as the expansion or contraction of the S-shaped structure), avoiding unexpected deformations such as twisting and bending of the elastic plate due to horizontal deviation. Therefore, the deformation signal captured by the strain gauge is only related to the force in the vertical direction, eliminating horizontal interference factors and ensuring that the pressure signal accurately reflects the contact state between the glue needle 411 and the reference surface.

[0051] In some embodiments, please refer to Figure 1 and Figure 2 To ensure that the fixed end 12 of the driving component 1 moves only in the vertical direction and to avoid affecting the accuracy of the test due to horizontal offset, the movement trajectory of the fixed end 12 of the driving component 1 is also restricted in the vertical direction. Specifically, the fixed end 12 of the driving component 1 is provided with a linear module 13 having a second slide rail 131 extending in the vertical direction. The module adapter 2 is provided with a second slide groove 22 extending in the vertical direction, and the second slide rail 131 is slidably connected to the second slide groove 22.

[0052] When the driving component 1 drives the module adapter 2 to move, the cooperation between the second slide rail 131 and the second slide groove 22 forms a vertical guiding constraint, restricting the module adapter 2's degrees of freedom in the horizontal direction (including translation and rotation). This means that the movement of the fixed end 12 of the driving component 1 is strictly limited to the vertical direction. This avoids horizontal offset caused by slight sway or assembly errors at the output end of the driving component 1, ensuring that the movement direction of the module adapter 2 driving the second connecting end 312 of the elastic plate remains parallel or collinear with the force direction of the first connecting end 311 of the elastic plate (fixed to the clamping structure 42), so that the elastic plate only produces tensile or compressive deformation in the vertical direction, avoiding torsional deformation.

[0053] In some embodiments, please refer to Figure 1 and Figure 4 To facilitate the replacement of the dispensing structure 41, a clamping structure 42 is used to clamp the dispensing structure 41. Specifically, the clamping structure 42 includes a first clamping plate 421, a second clamping plate 422, and a connecting assembly 423 passing between the first clamping plate 421 and the second clamping plate 422; the first clamping plate 421 forms a first arc surface, and the second clamping plate 422 forms a second arc surface, the first arc surface and the second arc surface together clamp the glue cylinder 412 of the dispensing structure 41; the second clamping plate 422 is connected to the pressure sensor 3.

[0054] The curvature radii of the first and second arc surfaces are adapted to the outer radius of the rubber tube 412, and can fit tightly against the outer surface of the rubber tube 412 when clamped, forming a ring-shaped fixation.

[0055] When the dispensing structure 41 needs to be replaced, the operator only needs to loosen the connecting component 423 to separate the first clamping plate 421 from the second clamping plate 422, and then remove the old glue cartridge 412. After inserting the new glue cartridge 412, align the first and second arc surfaces with the outer surface of the glue cartridge 412, and then tighten the connecting component 423. The clamping force of the two arc surfaces is used to quickly fix the glue cartridge 412. Compared with traditional threaded connections or snap-fit ​​fixing structures, the replacement operation of this clamping structure 42 does not require special tools and can be completed simply by manually tightening or loosening the wing screw 4233, making the operation convenient.

[0056] In some embodiments, please continue reading Figure 1 and Figure 4 To improve the clamping stability of the clamping structure 42 on the rubber cylinder 412, the connecting assembly 423 has been optimized. Specifically, the connecting assembly 423 includes a butterfly plate 4231, connecting posts 4232, and butterfly screws 4233. The butterfly plate 4231 has multiple circumferentially arranged wings; multiple connecting posts 4232 are provided, each of which is located on a wing of the butterfly plate 4231 and fixedly connected to the second clamping plate 422; the butterfly screws 4233 penetrate and are screwed into the butterfly plate 4231 and abut against the first clamping plate 421; wherein, the butterfly screws 4233 can move in the horizontal direction to loosen or tighten the first clamping plate 421.

[0057] In terms of structural details, the number of wings of the butterfly plate 4231 can be set to 3-4, evenly distributed circumferentially along the central axis of the butterfly plate 4231 to ensure that the connecting posts 4232 are subjected to balanced forces. The connecting post 4232 adopts a cylindrical structure, with one end fixed to the wing of the butterfly plate 4231 by welding or threaded connection, and the other end perpendicularly fixed to the second clamping plate 422 to form a stable support structure. The screw portion of the wing screw 4233 passes through the threaded hole in the center of the butterfly plate 4231 and is screwed thereto. The end of the screw is provided with a smooth pushing part, which abuts against the outer surface of the first clamping plate 421, and the end face of the pushing part is smoothed to reduce friction and wear between it and the first clamping plate 421 when tightened.

[0058] In specific operation, when the wing screw 4233 is tightened, it moves horizontally towards the first clamping plate 421. The pushing part applies a horizontal pushing force to the first clamping plate 421, causing the first clamping plate 421 to move closer to the second clamping plate 422. The first and second arc surfaces together form a clamping force on the rubber sleeve 412. When the wing screw 4233 is loosened, the pushing force disappears, and the first clamping plate 421, under the action of the spring 426 (see...), Figure 4The first clamping plate 4231 is separated from the second clamping plate 422, facilitating the placement and removal of the rubber sleeve 412. Multiple circumferentially distributed connecting posts 4232 securely connect the butterfly plate 4231 and the second clamping plate 422, forming a rigid support frame. This allows the thrust applied by the butterfly screw 4233 to be evenly transmitted through the butterfly plate 4231 to each connecting post 4232, and then from the connecting posts 4232 to the second clamping plate 422. This avoids structural deformation caused by excessive force at a single connection point, ensuring the relative position of the first clamping plate 421 and the second clamping plate 422 is stable, thereby ensuring that the clamping force is evenly applied to the surface of the rubber sleeve 412.

[0059] This embodiment of the utility model significantly improves the stability of the clamping structure 42 through the optimized connecting component 423. The supporting effect of multiple connecting columns 4232 makes it difficult for the butterfly plate 4231 to tilt or deform under force, ensuring that the thrust direction of the butterfly screw 4233 always remains horizontal, avoiding the problem of uneven distribution of clamping force caused by the skew of the thrust, and making it difficult for the rubber sleeve 412 to loosen or shift during the clamping process.

[0060] In some embodiments, please continue reading Figure 1 and Figure 4 To prevent the first clamping plate 421 from tilting during movement, a guide structure is added. Specifically, the connecting assembly 423 also includes a plurality of guide posts 4234 disposed between the butterfly plate 4231 and the second clamping plate 422. Each guide post 4234 passes through the first clamping plate 421 so that the first clamping plate 421 can move along the guide post 4234.

[0061] When the wing screw 4233 is tightened or loosened, the first clamping plate 421 moves axially along the guide post 4234 under the action of thrust or elastic force. The guide post 4234, through its cooperation with the guide hole, forcibly constrains the movement trajectory of the first clamping plate 421, so that it can only move closer to or away from the second clamping plate 422 in the horizontal direction, thus preventing the first clamping plate 421 from swaying or tilting during the movement.

[0062] In some embodiments, please continue reading Figure 1 and Figure 4 To support the dispensing structure 41, a positioning seat 424 is added. Specifically, the bottom end of the first clamping plate 421 is provided with a positioning seat 424, the glue needle 411 passes through the positioning seat 424, and the bottom end of the glue tube 412 abuts against the positioning seat 424. In the specific connection, the positioning seat 424 and the bottom end of the first clamping plate 421 can be connected by integral molding, bolt fastening, or snap-fit ​​connection, which facilitates the disassembly and replacement of the positioning seat 424 itself.

[0063] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A gel needle calibration device, characterized in that, include: Drive components, The module adapter is connected to the drive end of the drive component. A pressure sensor includes an elastic element capable of deformation, the elastic element being connected to the module adapter. A dispensing module includes a dispensing structure and a clamping structure for holding the dispensing structure, wherein the dispensing needle of the dispensing structure can contact a preset reference surface; the clamping structure is connected to the elastic element. When the glue needle of the dispensing structure touches the preset reference surface, the relative position between the dispensing module and the module adapter changes, the elastic element deforms and generates a pressure signal, and the driving component controls the module adapter to stop moving according to the pressure signal so that the glue needle is in the calibration position.

2. The gel needle calibration device according to claim 1, characterized in that, The driving end of the driving component drives the module adapter to move in the vertical direction; the module adapter is slidably connected to the clamping structure in the vertical direction.

3. The gel needle calibration device according to claim 2, characterized in that, In the vertical direction, the elastic element is an elastic plate, which has a first connecting end and a second connecting end opposite to each other; the first connecting end is fixedly connected to the clamping structure, and the second connecting end is fixedly connected to the module adapter.

4. The gel needle calibration device according to claim 3, characterized in that, The elastic plate has a hollow portion, a first opening is formed on the side of the first connecting end, and a second opening is formed on the side of the second connecting end. The first opening and the second opening are respectively connected to the hollow portion.

5. The gel needle calibration device according to claim 2, characterized in that, The module adapter is provided with a first slide rail extending along the vertical direction, and the clamping structure is provided with a first slide groove extending along the vertical direction, with the first slide rail slidably connected to the first slide groove.

6. The gel needle calibration device according to claim 2, characterized in that, The fixed end of the drive component is provided with a linear module having a second slide rail, the second slide rail extending along the vertical direction, and the module adapter is provided with a second slide groove extending along the vertical direction, the second slide rail being slidably connected to the second slide groove.

7. The gel needle calibration device according to claim 1, characterized in that, The clamping structure includes a first clamping plate, a second clamping plate, and a connecting assembly passing through the first clamping plate and the second clamping plate; The first clamping plate has a first arc surface, and the second clamping plate has a second arc surface. The first arc surface and the second arc surface together clamp the glue tube of the dispensing structure. The second clamp is connected to the pressure sensor.

8. The gel needle calibration device according to claim 7, characterized in that, The connection component includes: The butterfly-shaped plate has multiple circumferentially arranged wings; Multiple connecting posts are provided, each of which is located on the wing of the butterfly plate and fixedly connected to the second clamping plate; A wing screw passes through and is screwed into the wing plate, and abuts against the first clamping plate; The wing screw can move horizontally to loosen or tighten the first clamp.

9. The gel needle calibration device according to claim 8, characterized in that, The connecting assembly further includes a plurality of guide posts disposed between the butterfly plate and the second clamping plate, each of the guide posts passing through the first clamping plate so that the first clamping plate can move along the guide posts.

10. The gel needle calibration device according to claim 7, characterized in that, The bottom end of the first clamping plate is provided with a positioning seat, the glue needle passes through the positioning seat, and the bottom end of the glue tube abuts against the positioning seat.

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