A tin paste painting device

Abstract

The application provides a tin paste brushing device and relates to the technical field of tin paste brushing.The device comprises a base, a carrier plate assembly arranged on the base, a lifting driving mechanism installed on the base, a pressure spring mechanism and a screen printing assembly connected to the lifting driving mechanism, a pressing piston assembly, a tin paste box installed on the pressing piston assembly, the tin paste box located in the screen printing assembly, a lower outlet arranged at the bottom of the tin paste box, a self-locking piece arranged at the lower outlet of the tin paste box, a tin paste hole arranged on the self-locking piece, the self-locking piece capable of extending into the inner cavity of the tin paste box, a screen printing opening arranged at the position corresponding to the lower outlet of the tin paste box on the screen printing assembly, a scraper arranged at the screen printing opening, and a scraper driving assembly connected to the scraper.The application has the effects of reducing the cumbersome steps of the original simple jig brushing mode, greatly improving the work efficiency, and avoiding the risk that tin paste is contaminated and scattered to other parts of the heat sink due to manual contact with the tin paste.

Description

Technical Field

[0001] The present invention relates to the technical field of solder paste coating, and in particular to a solder paste coating device. Background Art

[0002] Solder paste, a new type of soldering material that emerged alongside SMT, is a paste-like mixture of solder powder, flux, and other surfactants and thixotropic agents. It's primarily used in the SMT industry for soldering electronic components such as resistors, capacitors, and integrated circuits on printed circuit boards (PCBs). It's an essential material in the assembly and production of servers and PCs.

[0003] During the assembly and production of servers and PCs, it is common for the thermal paste on the accessory radiators used for assembly to expire due to long storage times. The expired solder paste on the radiators must be replaced and refurbished before they can be reused in assembly and production.

[0004] Currently, the solder paste refurbishment method for radiators involves scraping off the expired solder paste, placing a screen printing jig on the radiator with one hand, and using a spatula with the other hand to scoop solder paste from the can onto the screen printing jig. The spatula is then used to apply the solder paste, and the screen printing jig is then removed. The refurbished radiator is then returned to its original box. However, this method involves many manual steps, making the movements cumbersome and inefficient. Frequent contact with the solder paste can easily cause it to stick to the hands, making it difficult to clean. A contaminated radiator that ends up in the hands of customers can easily lead to complaints. Using commercially available automated application devices is expensive and costly. Summary of the Invention

[0005] The purpose of the present invention is to propose and design a solder paste brushing device to address the problems that the solder paste renovation operation of the existing radiator is cumbersome, inefficient, and easy to stick to the hands and contaminate the radiator body.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a solder paste brushing device, including a base, a carrier plate assembly is provided on the base, the carrier plate assembly is used to place the radiator to limit the radiator, a lifting drive mechanism is installed on the base, the lifting drive mechanism is connected to a pressure spring mechanism and a screen printing assembly, the pressure spring mechanism includes a pressing piston assembly, a solder paste box is installed on the pressing piston assembly, the solder paste box is located in the screen printing assembly, a lower outlet is provided at the bottom of the solder paste box, a self-locking member is provided at the lower outlet of the solder paste box, and the self-locking member A solder paste hole is provided on the top, and the self-locking part can be extended into the inner cavity of the solder paste box. When the self-locking part is extended into the inner cavity of the solder paste box, the solder paste hole is connected to the inner cavity of the solder paste box. When the self-locking part is not extended into the inner cavity of the solder paste box, the lower outlet of the solder paste box is blocked. A screen printing port is provided on the screen printing component at a position corresponding to the lower outlet of the solder paste box, and a scraper is provided at the screen printing port. A scraper driving component is connected to the scraper, and a solder paste through hole is provided on the scraper. The scraper driving component can drive the scraper to move horizontally and connect the lower outlet of the solder paste box with the screen printing port through the solder paste through hole. During use, the radiator is mounted on the carrier assembly, and the pressure spring mechanism and the screen printing assembly move downward under the drive of the lifting drive mechanism. When the pressure spring mechanism drops to the lowest point, the self-locking part pushes upward, and the solder paste hole is connected to the inner cavity of the solder paste box. At this time, it is also connected to the solder paste through-hole on the scraper and the screen printing port. The solder paste in the solder paste box flows out through the solder paste through-hole and fills the radiator coating surface through the screen printing port. After filling, the scraper is driven by the scraper drive assembly to move horizontally, so that the solder paste through-hole on the scraper is staggered and no longer connected, thereby cutting off the solder paste flow. Then it moves upward, and the self-locking part resets and no longer connects to the inner cavity of the solder paste box. The scraper resets and resumes the conductive state. The solder paste holding part of the device is designed with a self-locking device to prevent the solder paste from overflowing. During the operation, no manual contact with the solder paste is required, avoiding the risk of manual contact with the solder paste causing the solder paste to contaminate other parts of the radiator. Only the lifting drive assembly needs to be operated, and a motor or other power device can also be installed to drive it, reducing the cumbersome steps of the original simple jig coating method and greatly improving the operation efficiency.

[0007] Furthermore, the pressing piston assembly includes a spring seat and a piston rod, the upper portion of the piston rod is connected to an extension rod, the extension rod is fitted with a first spring, one end of the first spring abuts against the upper end surface of the piston rod, and the other end of the first spring is connected to the spring seat, and the lower portion of the piston rod is installed with a solder paste box cover, the solder paste box cover is located in the inner cavity of the solder paste box and above the solder paste, and squeezes the solder paste from the top downward. Specifically, a spring cavity is provided in the spring seat, the first spring is provided in the spring cavity of the spring seat, and the spring seat is also provided with a guide post hole and a notch. The upper portion of the solder paste box is an open mechanism, the upper portion of the solder paste box is provided with an internal thread, the spring seat is provided with an external thread that adapts to the internal thread on the solder paste box, the solder paste box is threadedly connected to the spring seat, and the lower portion of the solder paste box is provided with a lower outlet, and the solder paste box cover squeezes the solder paste from the top downward in the inner cavity of the solder paste box, enabling the solder paste to be squeezed out from the lower outlet of the solder paste box. The extension rod is threadedly connected to the piston rod. The upper portion of the extension rod is provided with a cylindrical step, which moves up and down with the solder paste box lid to reflect the amount of solder paste in the solder paste box so that the solder paste can be replenished in time. It is also used to pull up the solder paste box lid when replacing and replenishing the solder paste box, making it convenient to remove the solder paste box for replenishment. An end cap is mounted on the spring seat, which is threadedly connected to the spring seat. The end cap is provided with an extension rod through hole, through which the extension rod passes. The extension rod and the end cap can move relative to each other. The upper end of the first spring is connected to the end cap, and the lower end of the first spring is connected to the upper end surface of the piston rod. When the solder paste box is filled with solder paste, the solder paste box lid is in an upward position, and the first spring is in a compressed state, which can continuously provide extrusion force to the solder paste box lid to continuously squeeze the solder paste in the solder paste box. When the spring seat moves downward, it can drive the end cap downward, thereby compressing the first spring to provide an extrusion force.

[0008] Furthermore, the self-locking component includes a plugging body, an upper stopper is provided on the upper portion of the plugging body, a lower stopper is provided on the lower portion of the plugging body, the outer diameter of the plugging body is adapted to the lower outlet of the solder paste box, the plugging body has an inner cavity with an upper opening, the solder paste hole is located on the side wall of the plugging body and is connected to the inner cavity of the plugging body, the upper stopper is located in the solder paste box, a second spring is mounted on the outer portion of the plugging body, the lower end of the second spring is connected to the lower stopper, and the upper end of the second spring is connected to the solder paste box. By providing the solder paste hole on the side wall of the plugging body, the side wall of the plugging body fits the lower outlet of the solder paste box, and the inner wall of the lower outlet of the solder paste box blocks the solder paste hole on the plugging body. In this state, the solder paste cannot be retained. When an external force is applied to the self-locking component to move it upward, the solder paste hole moves upward and is connected to the inner cavity of the solder paste box. In this state, the solder paste can flow out of the solder paste hole.

[0009] Furthermore, the screen printing assembly includes a screen printing body, which is provided with a cylindrical groove. The solder paste box is installed in the cylindrical groove. The cylindrical groove is used to precisely limit the solder paste box so that the self-locking part at the bottom of the solder paste box can accurately pass through the self-locking part opening; the bottom of the cylindrical groove is provided with a self-locking part opening and a screen printing hole. The shape of the screen printing hole can be designed into the required shape according to needs, and the thickness of the screen printing hole is the thickness of the solder paste coating; the diameter of the self-locking part opening is larger than the diameter of the screen printing hole, and a scraper groove is provided on the screen printing body. The scraper is installed in the scraper groove, and the scraper groove can guide the translation of the scraper; the scraper groove is located at the self-locking part opening, and the width of the scraper groove is smaller than the diameter of the self-locking part opening, forming a scraper groove step to share the pressure of the self-locking part on the scraper and reduce the friction of the scraper movement. A sink groove is provided at the bottom of the screen printing body for connecting the scraper connecting rod; a guide post hole is also provided on the screen printing body for installation on the guide post for guidance. A third spring is provided at the connection between the screen printing body and the guide post. When the lifting drive mechanism moves downward, the third spring compresses the third spring to apply pressure to the screen printing body, so that the bottom surface of the screen printing hole can fit tightly with the coating surface of the radiator, preventing gaps from overflowing when solder paste is filled.

[0010] Furthermore, the scraper drive assembly includes a scraper connecting rod and a chute slider. The chute slider is provided with a roller groove, which is a chute arranged in a front-to-back tilt. One end of the scraper connecting rod is threadedly connected to the scraper, and the other end of the scraper connecting rod is connected to the roller groove via a roller. By providing a roller groove that is tilted in a front-to-back tilt, the roller moves in the roller groove, allowing the scraper to move back and forth, thereby controlling the disconnection or connection of the channel formed by the screen printing hole and the lower outlet of the self-locking member, achieving linkage with the screen printing assembly and the pressure spring mechanism. The extrusion and cutting of the solder paste can be completed only by the action of the lifting drive mechanism. The scraper connecting rod is provided with a connecting rod fixing block, which is used to limit the scraper connecting rod to only lateral movement. The chute slider is also provided with a connecting rod fixing groove, which is used to connect the scraper assembly connecting rod.

[0011] Furthermore, the lifting drive mechanism includes a slider assembly and a cam assembly, the pressure spring mechanism and the screen printing assembly are both installed on the slider assembly, and the cam assembly is connected to the slider assembly and the scraper drive assembly.

[0012] Furthermore, the slider assembly includes two guide posts, the upper portions of which are connected by a connecting block, and the bottoms of which are mounted on a base via a guide post fixing seat. A slider is disposed between the two guide posts, and is slidably connected to the guide posts via upper and lower connecting arms, guiding the slider's up and down movement. The slider is provided with a vertically arranged chute, into which a chute slider is mounted, providing a mounting position for the chute slider. A spring seat is mounted on the upper connecting arm, and a screen body is mounted on the lower connecting arm. A third spring is disposed between the screen body and the lower connecting arm, and is sleeved onto the guide posts. One end of the third spring is connected to the screen body, and the other end is connected to the lower connecting arm. By compressing the third spring, pressure is applied to the screen body, allowing the bottom surface of the screen hole to tightly fit the radiator's painted surface. The screen body, spring seat, and chute slider are all assembled on the slider and driven by the slider, allowing a single drive to complete multiple actions.

[0013] Furthermore, the connecting block is provided with a first latch, which is aligned with the notch of the spring seat and is used to lock the pressing piston assembly when replacing the solder paste, facilitating the removal or installation of the solder paste box. The slider is provided with a second latch, which is aligned with the notch of the spring seat and is used to release the pressing piston assembly when replacing the solder paste, allowing the pressing piston assembly to move upward, facilitating the removal or installation of the solder paste box. In normal operation, the second latch is in a state of locking the pressing piston assembly. Both the first and second latches are removable.

[0014] Furthermore, the cam assembly includes a rotating wheel, each of which has a cam groove on its two sides. A scraper assembly connecting rod is connected to one of the cam grooves, and a slider assembly connecting rod is connected to the other cam groove. The two cam grooves are different cam grooves, which enable the scraper assembly and the slider assembly to move with different amplitudes. The lower end of the scraper assembly connecting rod is connected to the cam groove via a roller, and the upper end of the scraper assembly connecting rod is connected to the inclined groove slider. The lower end of the slider assembly connecting rod is connected to the cam groove via a roller, and the upper end of the slider assembly connecting rod is connected to the slider. Linear bearings are installed on both the scraper assembly connecting rod and the slider assembly connecting rod, and the linear bearings are used to limit the scraper assembly connecting rod and the slider assembly connecting rod to vertical movement. The rotating shaft is connected to the rotating wheel shaft, and the rotating wheel shaft is connected to the rotating wheel through a keyway and key. A turning handle is installed on the rotating wheel shaft. By shaking the turning handle, the rotating wheel can be driven to rotate, driving the lower ends of the limiting scraper assembly connecting rod and the slider assembly connecting rod to move along the cam groove.

[0015] Furthermore, a spring top piece is installed on the base. The spring top piece is located on one side of the rotating wheel. A V-shaped groove is provided on the circumferential surface of the rotating wheel, and the spring top piece is pressed against the circumferential surface of the rotating wheel. The V-shaped groove serves as the positioning point of the initial position; the spring designed in the spring top piece is in a compressed state, and pressure is continuously applied to the circumferential surface of the rotating wheel through the spring top piece. When the rotating wheel rotates until the spring top piece is aligned with the V-shaped groove, the spring top piece is pushed out and stuck in the V-shaped groove, and the rotation resistance of the rotating wheel increases, so that the rotating wheel will not rotate by itself without external force, thereby achieving the initial position positioning effect. The spring top piece includes a push rod, a spring cavity tube, a cavity tube end cover and a fourth spring. The fourth spring is provided in the spring cavity tube, and one end of the fourth spring is connected to the push rod. The fourth spring is in a compressed state and can give the push rod an outward force.

[0016] Furthermore, the carrier assembly includes a skateboard seat, on which a skateboard is slidably mounted, and two spaced-apart carriers are provided on the skateboard, on which a radiator is placed, and on which four adjustment blocks are provided. The adjustment blocks can move toward the center of a circle surrounded by the four adjustment blocks, that is, four long slots are provided, and the four long slots are evenly distributed along the circumference, and are spaced 90 degrees apart from each other. The adjustment blocks are installed in the long slots and can move along the long slots, and can then be adjusted according to the size of the radiator. The number is designed to be 2, which can reduce the feeding time of the radiator and improve efficiency.

[0017] It can be seen from the above technical solutions that the present invention has the following advantages:

[0018] 1. This device has a simple structure and low cost. Compared with the automatic painting device on the market, it can greatly reduce the production input cost.

[0019] 2. This device can be powered by a hand-cranked handle, does not require electrical drive, is not affected by the use environment, has a wide range of use environments, is more convenient, and can avoid the risk of electric shock due to leakage during use of the device.

[0020] 3. The solder paste holding part of this device is designed with a self-locking device to prevent the solder paste from overflowing. In addition, no manual contact with the solder paste is required during the operation, avoiding the risk of manual contact with the solder paste causing the solder paste to contaminate other parts of the radiator.

[0021] 4. This device is designed with two radiator carriers. After completing the solder paste coating on one radiator, you can quickly connect and start coating the next radiator. The manual participation part is only to pick up and place the radiator and turn the handle. It can reduce the tedious steps of the original simple fixture coating method and greatly improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the front axonometric structure of a specific embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the rear axle-measured structure of a specific embodiment of the present invention.

[0025] Figure 3 This is a structural diagram showing the installation position relationship of the scraper drive assembly according to a specific embodiment of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the pressure spring mechanism in a specific embodiment of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the pressing piston assembly in a specific embodiment of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the spring seat in a specific embodiment of the present invention.

[0029] Figure 7 Schematic diagram of the structure of the solder paste box in a specific embodiment of the present invention.

[0030] Figure 8 Schematic diagram of the structure of the extension rod in a specific embodiment of the present invention.

[0031] Figure 9 Schematic diagram of the structure of the end cover in a specific embodiment of the present invention.

[0032] Figure 10 Schematic diagram of the structure of the piston rod in a specific embodiment of the present invention.

[0033] Figure 11 It is a structural schematic diagram of the self-locking part in a specific embodiment of the present invention.

[0034] Figure 12 It is a schematic diagram of the top axonometric structure of the screen printing assembly in a specific embodiment of the present invention.

[0035] Figure 13 Schematic diagram of the bottom axonometric structure of the screen printing assembly in a specific embodiment of the present invention.

[0036] Figure 14 It is a schematic structural diagram showing a scraper groove according to a specific embodiment of the present invention.

[0037] Figure 15 Schematic diagram of the structure of the carrier board assembly in a specific embodiment of the present invention.

[0038] Figure 16 Schematic diagram of the structure of the slider assembly in a specific embodiment of the present invention.

[0039] Figure 17 Schematic diagram of the structure of the slider in a specific embodiment of the present invention.

[0040] Figure 18 It is a structural schematic diagram of the scraper drive assembly in a specific embodiment of the present invention.

[0041] Figure 19 It is a structural schematic diagram of the scraper connecting rod in a specific embodiment of the present invention.

[0042] Figure 20 It is a structural schematic diagram of the inclined slot slider in a specific embodiment of the present invention.

[0043] Figure 21 It is a structural schematic diagram of the cam assembly in a specific embodiment of the present invention.

[0044] Figure 22 It is a schematic diagram of the front axle-measurement structure of the cam assembly in a specific embodiment of the present invention.

[0045] Figure 23 It is a schematic diagram of the rear axle-view structure of the cam assembly in a specific embodiment of the present invention.

[0046] Figure 24 Schematic diagram of the structure of the rotating wheel in a specific embodiment of the present invention.

[0047] Figure 25 This is a schematic structural diagram of the cooperation between the spring top member and the rotating wheel in a specific embodiment of the present invention.

[0048] Figure 26 It is a schematic diagram of the split structure of the spring top member in a specific embodiment of the present invention.

[0049] In the figure, 1, base, 2, carrier assembly, 3, lifting drive mechanism, 4, pressure spring mechanism, 5, screen printing assembly, 6, solder paste box, 7, scraper drive assembly, 8, scraper, 9, spring top member, 201, slide seat, 202, carrier, 203, adjustment block, 204, slide, 301, guide column, 302, connecting block, 303, slider, 304, first buckle, 305, second buckle, 306, upper connecting arm, 307, lower connecting arm, 308, guide column fixing seat, 309, slide groove, 310, rotating wheel, 311, rotating wheel shaft, 312, turning handle, 313, slider assembly connecting rod, 314, scraper assembly connecting rod, 315, cam groove, 316, V-shaped groove, 40 1. Spring seat, 402. Self-locking part, 403. Extension rod, 404. End cover, 405. First spring, 406. Piston rod, 407. Solder paste box cover, 408. Notch, 4021. Blocking body, 4022. Upper stopper, 4023. Lower stopper, 4024. Solder paste hole, 501. Screen printing body, 502. Cylindrical groove, 503. Third spring, 504. Scraper groove, 505. Screen printing hole, 506. Scraper groove step, 601. Lower outlet, 701. Bevel slide block, 702. Roller groove, 703. Connecting rod fixing block, 704. Scraper connecting rod, 801. Solder paste through hole, 901. Ejector rod, 902. Fourth spring, 903. Spring cavity tube, 904. Cavity tube end cover. DETAILED DESCRIPTION

[0050] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0051] like Figures 1 to 26 As shown, this embodiment provides a solder paste brushing device, including a base 1, a carrier assembly 2 is provided on the base 1, and the carrier assembly 2 is used to place the radiator to limit the radiator. For details, see Figure 1 and Figure 15The carrier assembly 2 includes a skateboard seat 201, on which a skateboard 204 is slidably mounted. The skateboard 204 is provided with two carriers 202 arranged at intervals. The radiator is placed on the carrier 202, and four adjusting blocks 203 are provided on the carrier 202. The adjusting block 203 can move toward the center of a circle surrounded by the four adjusting blocks 203, that is, four long slots are provided, and the four long slots are evenly distributed along the circumference, and the two long slots are arranged at 90-degree intervals. The adjusting block 203 is installed in the long slot and can move along the long slot, and can then be adjusted according to the size of the radiator. The number is designed to be 2. After completing the coating of solder paste on one radiator, you can quickly connect to start coating the next radiator, which reduces the radiator feeding time and improves efficiency.

[0052] See also Figure 1 and Figure 2 A lifting drive mechanism 3 is mounted on the base 1, and a pressure spring mechanism 4 and a screen printing assembly 5 are connected to the lifting drive mechanism 3. The pressure spring mechanism 4 includes a pressing piston assembly, and a solder paste box 6 is mounted on the pressing piston assembly. The solder paste box 6 is located in the screen printing assembly 5, and a lower outlet 601 is provided at the bottom of the solder paste box 6. Figure 4 and Figure 5 The pressing piston assembly includes a spring seat 401 and a piston rod 406. The upper part of the piston rod 406 is connected to an extension rod 403. A first spring 405 is mounted on the extension rod 403. One end of the first spring 405 abuts against the upper end surface of the piston rod 406. The other end of the first spring 405 is connected to the spring seat 401. A solder paste box cover 407 is installed at the lower part of the piston rod 406. The solder paste box cover 407 is located in the inner cavity of the solder paste box 6 and above the solder paste, squeezing the solder paste from the top downward. For details, see Figure 6 The spring seat 401 is provided with a spring cavity, the first spring 405 is provided in the spring cavity of the spring seat 401, and the spring seat 401 is also provided with a guide post hole and a notch 408, the guide post hole is used to be installed on the guide post 301 and slide along the guide post 301. Figure 7The top of the solder paste box 6 is an open structure. The top of the solder paste box 6 is provided with internal threads. The spring seat 401 is provided with external threads that match the internal threads of the solder paste box 6. The solder paste box 6 is threadedly connected to the spring seat 401. The bottom of the solder paste box 6 is provided with a lower outlet 601. The solder paste box cover 407 squeezes the solder paste from top to bottom in the inner cavity of the solder paste box 6, allowing the solder paste to be squeezed out of the lower outlet 601 of the solder paste box 6. The extension rod 403 is threadedly connected to the piston rod 406. The top of the extension rod 403 is provided with a cylindrical step, which moves up and down with the solder paste box cover 407. It is used to reflect the amount of solder paste in the solder paste box 6 so that the solder paste can be replenished in time. It is also used to pull up the solder paste box cover 407 when replacing or replenishing the solder paste box 6, making it convenient to remove the solder paste box 6 for replenishing the solder paste. An end cover 404 is installed on the spring seat 401, and the end cover 404 is threadedly connected to the spring seat 401. A through hole for the extension rod 403 is provided on the end cover 404, and the extension rod 403 passes through the through hole for the extension rod 403. The extension rod 403 and the end cover 404 can move relative to each other. The upper end of the first spring 405 is connected to the end cover 404, and the lower end of the first spring 405 is connected to the upper end surface of the piston rod 406. When the solder paste box 6 is filled with solder paste, the solder paste box cover 407 is in an upper position, and the first spring 405 is in a compressed state, which can continuously provide an extrusion force for the solder paste box cover 407 to continuously squeeze the solder paste in the solder paste box 6. When the spring seat 401 moves downward, it can drive the end cover 404 to move downward, thereby also compressing the first spring 405 to provide an extrusion force.

[0053] See also Figure 4 、 Figure 5 as well as Figure 11A self-locking part 402 is provided at the lower outlet 601 of the solder paste box 6, and a solder paste hole 4024 is provided on the self-locking part 402. The self-locking part 402 can be extended into the inner cavity of the solder paste box 6. When the self-locking part 402 is extended into the inner cavity of the solder paste box 6, the solder paste hole 4024 is connected with the inner cavity of the solder paste box 6. When the self-locking part 402 is not extended into the inner cavity of the solder paste box 6, the lower outlet 601 of the solder paste box 6 is blocked. Specifically, the self-locking part 402 includes a blocking body 4021, an upper stop 4022 is provided on the upper part of the blocking body 4021, and a lower stop 4023 is provided on the lower part of the blocking body 4021. The outer diameter of the blocking body 4021 is adapted to the lower outlet 601 of the solder paste box 6. The blocking body 4021 has an inner cavity with an upper opening. The solder paste hole 4024 is located on the side wall of the blocking body 4021 and is connected to the inner cavity of the blocking body 4021. The upper stop 4022 is located in the solder paste box 6. A second spring is provided on the outer surface of the blocking body 4021. The lower end of the second spring is connected to the lower stop 4023, and the upper end of the second spring is connected to the solder paste box 6. By setting the solder paste hole 4024 on the side wall of the blocking body 4021, the side wall of the blocking body 4021 fits the lower outlet 601 of the solder paste box 6, and the inner wall of the lower outlet 601 of the solder paste box 6 blocks the solder paste hole 4024 on the blocking body 4021. In this state, the solder paste cannot be retained. When an external force is applied to the self-locking part 402 to move it upward, the solder paste hole 4024 moves upward and connects with the inner cavity of the solder paste box 6. In this state, the solder paste can flow out from the solder paste hole 4024.

[0054] See also Figure 3 A screen printing port is provided on the screen printing component 5 at a position corresponding to the lower outlet 601 of the solder paste box 6, and a scraper 8 is provided at the screen printing port. The scraper 8 is connected to a scraper driving component 7, and a solder paste through hole 801 is provided on the scraper 8. The scraper driving component 7 can drive the scraper 8 to move horizontally and connect the lower outlet 601 of the solder paste box 6 with the screen printing port through the solder paste through hole 801.

[0055] See also Figures 12 to 14The screen printing assembly 5 includes a screen printing body 501, a cylindrical groove 502 is provided on the screen printing body 501, and the solder paste box 6 is installed in the cylindrical groove 502. The cylindrical groove 502 is used to accurately limit the solder paste box 6 so that the self-locking part 402 at the bottom of the solder paste box 6 can accurately pass through the opening of the self-locking part 402; the bottom of the cylindrical groove 502 is provided with a self-locking part 402 opening and a screen printing hole 505. The shape of the screen printing hole 505 can be designed into a desired shape according to needs. The thickness of the screen printing hole 505 is the thickness of the solder paste coating. The thickness of the brush; the diameter of the opening of the self-locking member 402 is larger than the diameter of the screen printing hole 505, and a scraper groove 504 is provided on the screen printing body 501, and the scraper 8 is installed in the scraper groove 504, and the scraper groove 504 can guide the translation of the scraper 8; the scraper groove 504 is located at the opening of the self-locking member 402, and the width of the scraper groove 504 is smaller than the diameter of the opening of the self-locking member 402, forming a scraper groove step 506 to share the pressure of the self-locking member 402 on the scraper 8 and reduce the friction of the scraper 8 when moving. A groove is provided at the bottom of the screen printing body 501 for connecting the scraper connecting rod 704; a guide post hole is also provided on the screen printing body 501 for installation on the guide post 301 for guidance. A third spring 503 is provided at the connection between the screen printing body 501 and the guide post 301. When the lifting drive mechanism 3 moves downward, the third spring 503 is compressed to apply pressure to the screen printing body 501, so that the bottom surface of the screen printing hole 505 can be closely fitted with the coating surface of the radiator, preventing gaps from overflowing when solder paste is filled.

[0056] See also Figures 18 to 20 The scraper drive assembly 7 includes a scraper link 704 and an inclined slot slider 701. The inclined slot slider 701 is provided with a roller slot 702, which is arranged in a front-to-back inclined manner. One end of the scraper link 704 is threadedly connected to the scraper 8, and the other end of the scraper link 704 is connected to the roller slot 702 via a roller. By providing the front-to-back inclined roller slot 702, the roller moves in the roller slot 702, allowing the scraper 8 to move back and forth, thereby controlling the disconnection or connection of the channel formed by the screen printing hole 505 and the lower end outlet of the self-locking member 402, achieving linkage with the screen printing assembly 5 and the pressure spring mechanism 4. The extrusion and cutting of the solder paste can be completed only by the action of the lifting drive mechanism 3. The scraper link 704 is provided with a connecting rod fixing block 703, which is used to limit the scraper link 704 to lateral movement. The inclined slot slider 701 is also provided with a connecting rod fixing groove, which is used to connect the scraper assembly connecting rod 314.

[0057] In this embodiment, the lifting drive mechanism 3 includes a slider assembly and a cam assembly, the pressure spring mechanism 4 and the screen printing assembly 5 are both installed on the slider assembly, and the cam assembly is connected to the slider assembly and the scraper drive assembly 7. Figure 16 and Figure 17The slider assembly includes two guide pillars 301, the upper parts of the two guide pillars 301 are connected by a connecting block 302, and the bottoms of the two guide pillars 301 are installed on the base 1 through a guide pillar fixing seat 308. A slider 303 is provided between the two guide pillars 301, and the slider 303 is slidably connected to the guide pillars 301 through an upper connecting arm 306 and a lower connecting arm 307. The guide pillars 301 guide the up and down movement of the slider 303. A vertically arranged slide groove 309 is provided on the slider 303, and the inclined groove slider 701 is installed in the slide groove 309, and the slide groove 309 provides an installation position for the inclined groove slider 701; the spring seat 401 is installed on the upper connecting arm 306, and the screen body 501 is installed on the lower connecting arm 307. A third spring 503 is provided between the screen body 501 and the lower connecting arm 307. The third spring 503 is sleeved on the guide column 301, and one end of the third spring 503 is connected to the screen body 501, and the other end of the third spring 503 is connected to the lower connecting arm 307. By compressing the third spring 503, pressure is applied to the screen body 501, so that the bottom surface of the screen printing hole 505 can be closely fitted with the radiator coating surface. The screen body 501, the spring seat 401, and the inclined groove slider 701 are all assembled on the slider 303 and driven by the slider 303. Only one drive is required to complete multiple actions. Among them, see Figures 21 to 25 The cam assembly includes a rotating wheel 310, each of which has a cam groove 315 on each side. A scraper assembly connecting rod 314 is connected to one cam groove 315, and a slider assembly connecting rod 313 is connected to the other cam groove 315. The two cam grooves 315 are different cam grooves 315, which enable the scraper assembly and the slider assembly to move at different amplitudes. The lower end of the scraper assembly connecting rod 314 is connected to the cam groove 315 via a roller, and the upper end of the scraper assembly connecting rod 314 is connected to the inclined groove slider 701. The lower end of the slider assembly connecting rod 313 is connected to the cam groove 315 via a roller, and the upper end of the slider assembly connecting rod 313 is connected to the slider 303. Linear bearings are installed on both the scraper assembly connecting rod 314 and the slider assembly connecting rod 313. The linear bearings are used to limit the scraper assembly connecting rod 314 and the slider assembly connecting rod 313 to vertical movement. The rotating shaft is connected to a wheel shaft 311, which is connected to the rotating wheel 310 through a keyway and key. A turning handle 312 is mounted on the rotating wheel shaft 311. By shaking the turning handle 312, the rotating wheel 310 is rotated, driving the lower ends of the limiting scraper assembly connecting rod 314 and the slider assembly connecting rod 313 to move along the cam groove 315. A spring top member 9 is mounted on the base 1. The spring top member 9 is located on one side of the rotating wheel 310. The circumferential surface of the rotating wheel 310 is provided with a V-shaped groove 316, and the spring top member 9 presses against the circumferential surface of the rotating wheel 310. See Figure 25The V-shaped groove 316 serves as the initial position positioning point. The spring of the spring top member 9 is in a compressed state. The spring top member 9 continuously applies pressure to the circumferential surface of the rotating wheel 310. When the rotating wheel 310 rotates until the spring top member 9 is aligned with the V-shaped groove 316, the spring top member 9 is pushed out and locked into the V-shaped groove 316. The rotation resistance of the rotating wheel 310 increases, so that the rotating wheel 310 will not rotate on its own without external force, thus achieving the initial position positioning effect. Figure 26 The spring top member 9 includes a top rod 901, a spring cavity tube 903, a cavity tube end cover 904 and a fourth spring 902. The fourth spring 902 is arranged in the spring cavity tube 903. One end of the fourth spring 902 is connected to the top rod 901. The fourth spring 902 is in a compressed state and can give the top rod 901 an outward pushing force.

[0058] See also Figure 2 and Figure 16 In order to facilitate the replacement of the solder paste box 6, a first clip 304 is detachably mounted on the connecting block 302, and the first clip 304 is aligned with the notch 408 of the spring seat 401, and is used to lock the pressing piston assembly when replacing the solder paste, thereby facilitating the removal or installation of the solder paste box 6; a second clip 305 is detachably mounted on the slider 303, and the second clip 305 is aligned with the notch 408 of the spring seat 401, and is used to loosen the pressing piston assembly when replacing the solder paste, so that the pressing piston assembly can move upward, thereby facilitating the removal or installation of the solder paste box 6. In normal state, the second clip 305 is in a state of locking the pressing piston assembly.

[0059] The operating principle is as follows: Turning the knob 312 places the wheel 310 in its initial position. Initially, the solder paste through-holes 801 on the scraper 8 are in contact with the screen printing holes 505 of the screen printing assembly 5. Adjust the adjustment blocks 203 of the two platforms 202 on the slide 204 to match the size of the radiator. Place the two radiators, after removing expired solder paste, on the respective platforms 202. Slide the slide 204 to its leftmost or rightmost end, so that the left or right radiator's coating surface is aligned vertically with the screen printing opening of the screen printing assembly 5. Turning the knob 312 clockwise rotates the wheel 310, driving the slider 303 downward. This also moves the pressure spring mechanism 4 and the screen printing assembly 5 downward. After the screen printing holes 505 of the screen printing assembly 5 contact the radiator's coating surface, the slider 303 continues its downward movement, applying a downward force to the screen printing assembly 5 via the third spring 503, bringing the screen printing holes 505 into close contact with the radiator's coating surface. Continue to turn the handle 312, and after the lower end surface of the self-locking member 402 of the pressure spring mechanism 4 contacts the upper plane of the scraper 8, the pressure spring mechanism 4 continues to move downward. Since the lower end surface of the self-locking member 402 has already pressed against the plane of the scraper 8, the lower outlet 601 of the solder paste box 6 and the self-locking member 402 begin to move relative to each other, and the self-locking member 402 is pushed upward relative to the solder paste box 6. The solder paste hole 4024 on the self-locking member 402 is exposed from the bottom surface of the inner cavity of the solder paste box 6. At this time, the solder paste hole 4024 is aligned with the self-locking member 402. The lower outlet 601 of the lock 402, the solder paste through hole 801, and the screen printing port form a channel. The solder paste in the solder paste box 6 flows along the channel to the radiator coating surface for filling. After the solder paste hole 4024 is completely exposed from the bottom surface of the inner cavity of the solder paste box 6, the pressure spring mechanism 4 moves downward to the lowest point; continue to rotate the handle 312, and the pressure spring mechanism 4 continues to remain at the lowest point under the action of the cam groove 315 on the rotating wheel 310. The scraper 8 begins to move horizontally under the action of the cam groove 315. The solder paste through hole 801 on the scraper 8 is staggered with the screen printing hole 505 of the screen printing assembly 5 and the lower end surface outlet of the self-locking member 402, thereby cutting off the path for the solder paste to flow to the coating surface of the radiator; the handle 312 is continuously rotated, and the scraper 8 continues to maintain the through hole and the screen printing hole 505 staggered under the action of the cam groove 315. The pressure spring mechanism 4 starts to move upward under the drive of the slider 303, and the self-locking member 402 returns to its original state under the action of the spring force, so that the solder paste hole 4024 sinks into the Inside the lower outlet 601 of the solder paste box 6, seal the lower outlet 601 and cut off the solder paste outflow channel; continue to rotate the handle 312, and the scraper 8, under the action of the cam groove 315, moves horizontally to restore the conductive state between the solder paste through-hole 801 and the screen printing hole 505; continue to rotate the handle 312, and the slider 303 drives the pressure spring mechanism 4 and the screen printing assembly 5 upward. When the wheel 310 returns to the initial position, the handle 312 has rotated 360 degrees, completing one solder paste application. Move the slide 204 to the other end, remove the heat sink with the solder paste applied, and then vertically align the coated surface of the other uncoated heat sink with the screen printing hole. Rotate the handle 312 clockwise one full circle to complete the solder paste application.

[0060] In the present description, claims, and accompanying drawings, the terms "upper," "lower," "outer," "inner," and the like (if any) are used to distinguish relative positions, and are not necessarily qualitative. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0061] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solder paste brushing device, comprising a base, on which a carrier assembly is provided, characterized in that: A lifting drive mechanism is installed on the base, and a pressure spring mechanism and a screen printing assembly are connected to the lifting drive mechanism; The pressure spring mechanism includes a pressing piston assembly, a solder paste box is mounted on the pressing piston assembly, the solder paste box is located in the screen printing assembly, the solder paste box is provided with a lower outlet, and a self-locking member is provided at the lower outlet of the solder paste box, and the self-locking member can block the lower outlet of the solder paste box; A screen printing port is provided on the screen printing assembly at a position corresponding to the lower outlet of the solder paste box, a scraper is provided at the screen printing port, a scraper driving assembly is connected to the scraper, a solder paste through hole is provided on the scraper, and the scraper driving assembly can drive the scraper to translate and connect the lower outlet of the solder paste box with the screen printing port through the solder paste through hole; The scraper driving assembly includes a scraper connecting rod and an inclined slot slider, the inclined slot slider is provided with a roller groove, and the roller groove is an inclined slot arranged front to back. One end of the scraper connecting rod is threadedly connected to the scraper, and the other end of the scraper connecting rod is connected to the roller groove through a roller. The lifting drive mechanism includes a slider assembly and a cam assembly, and the pressure spring mechanism and the screen printing assembly are both installed on the slider assembly; The slider assembly includes a guide post, a slider is provided on the guide post, the slider is slidably connected to the guide post through an upper connecting arm and a lower connecting arm, the slider is provided with a vertically arranged slide groove, and the inclined slot slider is installed in the slide groove; The cam assembly includes a rotating wheel, and a cam groove is provided on each of the two side surfaces of the rotating wheel, wherein a scraper assembly connecting rod is connected to one of the cam grooves, and a slider assembly connecting rod is connected to the other cam groove. The lower end of the scraper assembly connecting rod is connected to the cam groove through a roller, and the upper end of the scraper assembly connecting rod is connected to the inclined groove slider. The lower end of the slider assembly connecting rod is connected to the cam groove through a roller, and the upper end of the slider assembly connecting rod is connected to the slider.

2. The solder paste coating device according to claim 1, wherein: The pressing piston assembly includes a spring seat and a piston rod. The upper part of the piston rod is connected to an extension rod. A first spring is mounted on the extension rod. One end of the first spring abuts against the upper end surface of the piston rod. The other end of the first spring is connected to the spring seat. A solder paste box cover is installed at the lower part of the piston rod. The solder paste box cover is located in the inner cavity of the solder paste box. The spring seat is installed on the upper connecting arm.

3. The solder paste coating device according to claim 2, characterized in that: The self-locking member includes a blocking body, the outer diameter of which is adapted to the lower outlet of the solder paste box, the blocking body having an inner cavity with an upper opening, and a solder paste hole provided on a side wall of the blocking body, the solder paste hole being in communication with the inner cavity of the blocking body; An upper stop is provided on the upper part of the blocking body, and a lower stop is provided on the lower part of the blocking body. The upper stop is located in the solder paste box. A second spring is sleeved on the outer part of the blocking body. The lower end of the second spring is connected to the lower stop, and the upper end of the second spring is connected to the solder paste box.

4. The solder paste coating device according to claim 1, wherein: The screen printing assembly includes a screen printing body, the screen printing body is installed on the lower connecting arm, a third spring is provided between the screen printing body and the lower connecting arm, a cylindrical groove is provided on the screen printing body, and the solder paste box is installed in the cylindrical groove; A self-locking piece opening and a screen printing hole are provided at the bottom of the cylindrical groove. The diameter of the self-locking piece opening is larger than the diameter of the screen printing hole. A scraper groove is provided on the screen printing body. The scraper is installed in the scraper groove. The scraper groove is located at the self-locking piece opening. The width of the scraper groove is smaller than the diameter of the self-locking piece opening and forms a scraper groove step.

5. The solder paste coating device according to claim 1, wherein: A connecting block is provided on the upper portion of the guide column, a first clip is provided on the connecting block, a second clip is provided on the slider, and the first clip and the second clip are aligned with the notch on the pressure spring mechanism.

6. The solder paste coating device according to claim 1, wherein: A spring top piece is installed on the base, and the spring top piece is located on one side of the rotating wheel. A V-shaped groove is provided on the circumferential surface of the rotating wheel, and the spring top piece presses against the circumferential surface of the rotating wheel.

7. The solder paste coating device according to any one of claims 1 to 6, characterized in that: The carrier assembly comprises a skateboard seat, a skateboard is slidably mounted on the skateboard seat, two carriers arranged at intervals are provided on the skateboard, and an adjustment block is provided on the carrier.

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