Positioning clamp for LED lamp plate welding

Abstract

The application discloses a positioning clamp for LED lamp plate welding and relates to the technical field of positioning clamps for lamp plate welding.The positioning clamp comprises a workbench and a suction assembly.The suction assembly comprises a mounting cylinder arranged at the center of the workbench.A negative pressure pump is fixedly installed on the workbench and communicates with the inside of the mounting cylinder.A vertical rod is slidingly installed at the axis of the mounting cylinder.The top end of the vertical rod is fixedly connected with a supporting plate after penetrating through the mounting cylinder upwardly.Two symmetrical fan-shaped movable openings are formed in the top surface of the workbench and a positioning assembly is installed in each of the fan-shaped movable openings.The vertical rod and the positioning assembly are cooperatively arranged to realize the centering and preliminary clamping of the lamp plate, increase the stability of the fixation of the lamp plate, have high centering precision, can be suitable for lamp plates of various sizes and shapes, and will not generate excessive clamping force on the side wall of the lamp plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of positioning clamps for lamp panel welding, in particular to a positioning clamp for LED lamp panel welding. BACKGROUND

[0002] In the automated production process of LED lamps, accurately and stably welding multiple LED lamp beads on a circuit board (i.e. LED lamp panel) is one of the core processes to ensure the quality and reliability of finished products. This process usually requires the use of a special positioning clamp to reliably fix the lamp panel in the working position to prevent it from shifting or vibrating during welding and to ensure welding accuracy.

[0003] Currently, the common positioning clamp for LED lamp panel welding mainly uses independent pneumatic clamps in combination with a special jig to clamp and weld the two or four sides of the LED lamp panel. Although this type of clamp has a large clamping force, it has the following inherent defects: first, for LED lamp panels of different sizes or shapes (such as square and rectangular), the adjustment efficiency is low when adjusting the clamps, which affects the welding efficiency, and it is difficult to ensure the consistency of the center of the lamp panel each time it is positioned, which can cause misalignment of the welding points; second, multiple clamps may be used, each with its own independent control system. This type of multi-point independent drive clamp has errors in synchronization, which can cause uneven clamping stress on light and thin LED lamp panels, leading to problems such as lamp panel distortion or local stress concentration, which can affect the solder fracture during welding. SUMMARY

[0004] To solve the above technical problems, the present application provides a positioning clamp for LED lamp panel welding.

[0005] The technical solution is as follows:

[0006] A positioning clamp for LED lamp panel welding, comprising a workbench, a suction assembly is installed at the center of the workbench, the suction assembly comprises an installation cylinder arranged at the center of the workbench, and a negative pressure pump is fixedly installed on the workbench and communicates with the inside of the installation cylinder;

[0007] A vertical rod is slidingly installed at the center of the installation cylinder, a supporting plate is fixedly connected to the top end of the vertical rod after it passes out of the installation cylinder upward, a fixing piece is fixedly connected to the bottom end of the vertical rod after it passes out of the installation cylinder downward, and two symmetrical fan-shaped movable openings are formed in the top surface of the workbench, and a positioning assembly is installed in the fan-shaped movable opening;

[0008] The positioning assembly comprises a guide plate located in the fan-shaped movable opening and a rotating ring rotatably arranged on the fixing piece, the guide plate can rotate in the fan-shaped movable opening with the center of the vertical rod as the center, a guide groove is formed in the guide plate, a first clamping piece is slidingly installed in the guide groove, and a connecting rod is hingedly connected between the bottom of the first clamping piece and the rotating ring;

[0009] The top axis of the mounting cylinder is provided with a suction accessory, which comprises a first rubber bellow fixedly installed on the top surface of the mounting cylinder, and the inside of the mounting cylinder is communicated with the inside of the first rubber bellow. The top of the first rubber bellow is provided with a suction disc, and the supporting plate is higher than the suction disc.

[0010] Further, the outer surface of the mounting cylinder is provided with a circular-arc-shaped mounting groove concentric with the mounting cylinder, and one end of the guide plate is slidingly connected in the mounting groove.

[0011] Further, the top surface of the workbench is provided with a fastener for fixing the guide plate on the workbench.

[0012] Further, the fastener is a fastening bolt, an arc-shaped groove is formed in the inner wall of the fan-shaped movable opening away from the mounting cylinder, the end of the guide plate away from the mounting cylinder is located in the arc-shaped groove and can slide in the arc-shaped groove, a threaded hole is formed in the guide plate located in the arc-shaped groove, an arc-shaped hole is formed in the top surface of the workbench and communicated with the arc-shaped groove, and the fastening bolt is connected with the threaded hole after passing through the arc-shaped hole downward to fix the guide plate on the workbench.

[0013] Further, the first clamping member comprises a clamping seat slidingly arranged in the guide groove, the clamping seat is L-shaped, and two edges of the clamping seat are symmetrically arranged about the guide groove. The top of each of the two edges of the clamping seat is fixedly connected with an arc-shaped matching block matched with the side wall of the lamp plate. The two arc-shaped matching blocks are symmetrically arranged about the guide groove, and the arc-shaped matching block is arc-shaped on the side facing the guide groove.

[0014] Further, the bottom of the workbench is provided with a one-way limiting assembly, which comprises a fixing seat arranged on the bottom wall of the workbench and a ratchet gear arranged vertically on the outer wall of the vertical rod. The fixing seat is rotatably provided with a ratchet pawl matched with the ratchet gear. The ratchet pawl and the fixing seat are fixedly connected with a spring. The outer wall of the ratchet pawl is fixedly connected with a handle. The side of the ratchet pawl away from the spring is provided with a limiting column fixedly connected with the fixing seat.

[0015] Further, the mounting cylinder is slidingly provided with a piston disc fixedly connected with the vertical rod. The second rubber bellow is fixedly connected between the piston disc and the bottom wall inside the mounting cylinder. The outer wall of the second rubber bellow and the mounting cylinder form an air cavity. The piston disc top wall and the mounting cylinder form a negative pressure cavity. The piston disc is provided with a through hole communicated with the inside of the second rubber bellow and a second air hole communicated with the negative pressure cavity and the air cavity. The output end of the negative pressure pump is provided with an air pipe communicated with the inside of the second rubber bellow.

[0016] Further, the top of the workbench is provided with symmetrically arranged sliding grooves, and the sliding grooves are slidingly provided with an auxiliary clamping assembly for auxiliary clamping of the lamp plate.

[0017] Further, the auxiliary clamping assembly comprises two mounting seats arranged on the bottom surface of the workbench, the mounting seat close to one side of the mounting cylinder is provided with a through hole, a support is slidably connected in the through hole, a guide rod is fixedly connected between the mounting seat away from the mounting cylinder and the support, a sliding block is slidably arranged on the guide rod, a second clamping piece identical in structure with the first clamping piece is arranged on the top of the sliding block, a third rubber bellows is arranged on the guide rod, and a connecting pipe in communication with the air cavity is connected to the through hole.

[0018] Further, the top wall and the bottom wall of the mounting cylinder are provided with spline grooves, and the outer wall of the vertical rod is provided with splines matched with the spline grooves.

[0019] As described above, the LED lamp panel welding positioning clamp has the following beneficial effects:

[0020] Through the cooperation of the vertical rod and the positioning assembly, the centering and preliminary clamping of the lamp panel are realized, the stability of the lamp panel fixing is increased through the flexible adsorption, the centering accuracy is high, the lamp panel of various sizes and shapes can be adapted, excessive clamping force on the side wall of the lamp panel is avoided, the error in synchronism of the clamping jaws in the prior art is avoided, the uneven clamping stress on the light and thin lamp panel is avoided, the lamp panel is prevented from being damaged due to excessive extrusion caused by the distortion of the lamp panel and the local stress concentration, and the problem of solder fracture caused by the bending of the lamp panel is solved.

[0021] The lamp panel bottom surface and the lamp panel side surface can be simultaneously limited, the stability is high, and a good foundation is provided for subsequent LED lamp bead welding.

[0022] Through the setting of the one-way limiting assembly, the upward movement of the vertical rod is prevented, the clamping force on the lamp panel is prevented from being loosened, the axial limiting of the vertical rod is formed in the best clamping state of the lamp panel, even if the adsorption assembly fails in the subsequent welding process, the clamping of the lamp panel can be ensured through the mechanical locking of the one-way limiting assembly, and the stability of the LED lamp welding is improved.

[0023] Through the auxiliary clamping assembly, the stability of the clamping of the lamp panel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the state of clamping the lamp panel of the present application;

[0025] Figure 2 It is a schematic view of the overall component of the present application;

[0026] Figure 3 It is a schematic view of the bottom perspective structure of the present application;

[0027] Figure 4 It is a schematic view of the first perspective section of the present application, and the section plane in the present perspective passes through the fan-shaped movable port.

[0028] Figure 5 For the second perspective of the application, the section plane in this perspective penetrates the sliding groove;

[0029] Figure 6 For the second perspective of the application, the section plane in this perspective penetrates the sliding groove; Figure 5

[0030] For the second perspective of the application, the section plane in this perspective penetrates the sliding groove; Figure 7 Figure 5 For the second perspective of the application, the section plane in this perspective penetrates the sliding groove;

[0031] Figure 8 For the second perspective of the application, the section plane in this perspective penetrates the sliding groove;

[0032] Figure 9 Figure 4 For the second perspective of the application, the section plane in this perspective penetrates the sliding groove.

[0033] In the present application, the reference numbers are as follows:

[0034] 100, workbench; 110, fan-shaped movable opening; 120, sliding groove; 210, mounting cylinder; 211, air cavity; 212, negative pressure cavity; 220, vertical rod; 221, supporting plate; 222, fixing piece; 223, piston disc; 230, first rubber bellows; 240, second rubber bellows; 250, negative pressure pump; 310, guide plate; 321, clamping seat; 322, arc-shaped matching block; 330, connecting rod; 340, rotating ring; 350, mounting groove; 360, arc-shaped groove; 370, guide groove; 410, mounting seat; 420, through hole; 430, support; 440, guide rod; 450, sliding block; 460, third rubber bellows; 510, ratchet gear row; 520, fixing seat; 530, ratchet claw; 540, spring; 550, rotating handle; 560, limiting column. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0036] The embodiments provided by the present application will be described in detail below:

[0037] As Figures 1 to 8 ​​As shown in the drawings, the positioning fixture for LED lamp plate welding comprises a workbench 100, a suction assembly is installed at the center of the workbench 100, the suction assembly comprises an installation cylinder 210 arranged at the center of the workbench 100, a vertical rod 220 is slidingly installed at the axis of the installation cylinder 210, the vertical rod 220 comprises three sections, the first section is upwardly arranged through the installation cylinder 210 and located above the workbench 100, the second section is arranged in the installation cylinder 210, and the third section is downwardly arranged through the installation cylinder 210 and located below the installation cylinder 210. A supporting plate 221 for placing a lamp plate is fixedly installed at the top end of the first section of the vertical rod 220, and a fixing member 222 is fixedly connected to the bottom end of the third section of the vertical rod 220. The top surface of the workbench 100 is square, two fan-shaped movable openings 110 are arranged symmetrically about one diagonal line of the top surface of the workbench 100, and a positioning assembly is installed in the two fan-shaped movable openings 110.

[0038] It should be noted that the top wall and the bottom wall of the installation cylinder 210 are both provided with spline grooves, and the outer wall of the vertical rod 220 is provided with splines matched with the spline grooves. When the vertical rod 220 moves up and down, the splines can prevent the vertical rod 220 from rotating and causing displacement of the lamp plate, so that the lamp bead welding is more stable.

[0039] As shown in the drawings, Figure 3 , Figure 4 and Figure 9 The positioning assembly comprises two guide plates 310 and a rotating ring 340 rotatably arranged on the fixing member 222, the two guide plates 310 are respectively arranged in the two fan-shaped movable openings 110, the outer surface of the installation cylinder 210 is provided with an installation groove 350 in the shape of a circular arc and concentric with the installation cylinder 210, one end of the guide plate 310 close to the installation cylinder 210 is slidingly connected in the installation groove 350, that is, the one end of the guide plate 310 close to the installation cylinder 210 can slide along the installation groove 350, and the movement track of the guide plate 310 is circular, and the guide plate 310 can rotate in the fan-shaped movable opening 110 with the axis of the vertical rod 220 as the center.

[0040] It should be noted that when the guide plate 310 is rotated during use of the positioning fixture, the position of the guide plate 310 needs to be fixed. To this end, a fastener is installed on the top surface of the workbench 100, and the fastener is used to limit the adjusted guide plate 310. Specifically, an arc-shaped groove 360 is formed in the inner wall of the fan-shaped movable opening 110 away from the installation cylinder 210, one end of the guide plate 310 away from the installation cylinder 210 is located in the arc-shaped groove 360 and can slide in the arc-shaped groove 360, a threaded hole is formed in the guide plate 310 located in the arc-shaped groove 360, and an arc-shaped hole (not shown) is formed in the top surface of the workbench 100 and communicates with the arc-shaped groove 360. The threaded hole in the guide plate 310 is connected with the arc-shaped hole in the workbench 100 through a fastening bolt, so that the guide plate 310 is fixed on the workbench 100.

[0041] The guide plate 310 is provided with a guide groove 370, and a first clamping piece is slidably installed in the guide groove 370. A connecting rod 330 is hingedly connected between the bottom of the first clamping piece and the rotating ring 340.

[0042] As shown in Figure 8 , the first clamping piece includes a clamping seat 321 slidably installed in the guide groove 370. The clamping seat 321 is L-shaped, and two edges thereof are symmetrically arranged about the guide groove 370. The top of each of the two edges of the clamping seat 321 is fixedly connected with an arc-shaped matching block 322 matched with the side wall of the lamp plate. The two arc-shaped matching blocks 322 are symmetrically arranged about the guide groove 370, and the arc-shaped surface of the arc-shaped matching block 322 faces the guide groove 370.

[0043] When the positioning clamp is used, the lamp plate to be processed is placed on the supporting plate 221, and the arc-shaped matching blocks 322 on the first clamping piece clamp the side surfaces of two opposite corners of the lamp plate to center and position the lamp plate. The guide plate 310 is designed to be rotatable, and the arc-shaped matching blocks 322 can be adjusted to the most suitable position for clamping for different shapes of lamp plates. In addition, the guide plate 310 is provided with the guide groove 370, so it can clamp and position lamp plates of various sizes, has flexibility, improves the application range of the clamp to different LED lamp plates, and can ensure the consistency of the center of the lamp plate after positioning each time, so as to increase the stability of welding.

[0044] It should be noted that the arc-shaped matching blocks 322 can be in contact with both straight edges and circular edges, so they can be used to clamp both rectangular lamp plates and circular lamp plates, ensuring the positioning effect of the lamp plate and improving the applicability of the clamp, while also increasing the stability of the LED lamp bead welding.

[0045] As shown in Figure 4 and Figure 5 , the mounting cylinder 210 is hollow inside, and a suction accessory is installed at the top axial center of the mounting cylinder 210. The suction accessory includes a first rubber bellows 230 connected to the top of the mounting cylinder 210, and a suction disc is installed at the top of the first rubber bellows 230. The first rubber bellows 230 surrounds the supporting plate 221, and the supporting plate 221 is higher than the suction disc.

[0046] The mounting cylinder 210 has a first air hole at the top, which communicates with the cavity and the first rubber bellows 230. The bottom of the mounting cylinder 210 is connected with a negative pressure pump 250, which is fixedly installed on the workbench 100. The negative pressure pump 250 is used to draw the inside of the suction accessory to negative pressure and drive the vertical rod 220 to move downward.

[0047] The lamp panel is placed on the top of the supporting plate 221. For a heavy lamp panel, the lamp panel will press the supporting plate 221 due to its own weight until the lamp panel is attached to the suction cup. For a light lamp panel, the user can apply a certain pressure to the lamp panel with his hand until the bottom surface of the lamp panel is attached to the suction cup. During the process of moving the lamp panel downward to be attached to the suction cup, the supporting plate 221 is pressed downward to drive the vertical rod 220 to move downward, the vertical rod 220 drives the fixing member 222 to move downward, the fixing member 222 drives the connecting rod 330 to rotate, the connecting rod 330 rotates inward to drive the first clamping member to slide along the guide groove 370 to the side close to the lamp panel until the lamp panel is attached to the suction cup, at which time the vertical rod 220 stops moving downward and the first clamping member stops moving.

[0048] After the lamp panel is attached to the suction cup, the negative pressure pump 250 draws the space between the lamp panel and the suction cup to negative pressure, so that the lamp panel is subjected to a downward force, thereby driving the vertical rod 220 to move downward, at which time the first rubber bellow 230 is compressed, the vertical rod 220 drives the fixing member 222 to move downward, the fixing member 222 drives the connecting rod 330 to rotate inward, the connecting rod 330 drives the arc-shaped fitting block 322 to slide along the guide groove 370 to the side close to the lamp panel, thereby clamping and positioning the side wall at the diagonal position of the lamp panel, realizing self-centering positioning and preliminary clamping of the lamp panel. Through the diagonal positioning principle combined with flexible suction, the stability of the lamp panel centering and fixing is increased, the centering accuracy is high, and the device can adapt to lamp panels of various sizes and shapes without generating excessive clamping force on the side wall of the lamp panel. Moreover, the device avoids the error in synchronization of the existing technology of multiple-point independent driving clamping jaws, which causes uneven clamping stress on the light and thin lamp panel, avoids the distortion of the lamp panel or the local stress concentration to cause excessive extrusion of the lamp panel and damage, and solves the problem of solder fracture caused by bending of the lamp panel.

[0049] In addition, the device can limit the bottom surface and the side wall of the lamp panel at the same time, has high stability, and provides a good foundation for subsequent welding.

[0050] For example, Figure 3 , Figure 5 and Figure 6The workbench 100 is provided with a one-way limiting assembly at the bottom. The one-way limiting assembly comprises a fixed seat 520 arranged on the bottom wall of the workbench 100 and a ratchet gear 510 vertically arranged on the outer wall of the third section of the vertical rod 220. The ratchet gear 510 comprises ratchets arranged in a straight line, and the ratchets form a gear slot therebetween. The fixed seat 520 is rotatably provided with a pawl 530 matched with the ratchet gear 510. The pawl 530 is fixedly connected with the fixed seat 520 and provided with a spring 540. The spring 540 is used to provide elastic force to keep the pawl 530 pressed against the ratchet gear 510. The outer wall of the pawl 530 is fixedly connected with a rotating handle 550. The side of the pawl 530 away from the spring 540 is provided with a limiting column 560 fixedly connected with the fixed seat 520. In the normal state, the pawl 530 is embedded in the gear slot. When the ratchet gear 510 moves downward, the pawl 530 rotates away from the limiting column 560, the pawl 530 is separated from the gear slot, and the spring 540 is compressed, so that the ratchet gear 510 can normally move downward. When the ratchet gear 510 has a tendency to move upward, the pawl 530 has a tendency to rotate toward the limiting column 560, but the pawl 530 cannot rotate under the limitation of the limiting column 560, so that the ratchet gear 510 cannot move upward. Therefore, the vertical rod 220 can only move downward under the engagement of the ratchet gear 510 and the pawl 530, and cannot move upward. If the vertical rod 220 needs to move upward, the pawl 530 is driven to rotate away from the ratchet gear 510 by holding the rotating handle 550, so that the limitation of the ratchet gear 510 and the pawl 530 is released.

[0051] It should be noted that the one-way limiting assembly is arranged to prevent the vertical rod 220 from moving upward to cause the clamping force on the lamp panel to be loose, so that the vertical rod 220 is axially limited in the state that the lamp panel is optimally clamped. Even if the adsorption assembly fails in the subsequent welding process, the clamping of the lamp panel can be ensured by the mechanical locking of the one-way limiting assembly, and the stability of the device is improved.

[0052] Specifically, when the vertical rod 220 moves downward, the ratchet gear 510 is driven to move downward, and the ratchet gear 510 drives the pawl 530 to rotate. When the ratchet gear 510 does not move, the pawl 530 is pressed against the ratchet gear 510 by the spring 540, so as to limit the axial direction of the vertical rod 220 and prevent the vertical rod 220 from moving upward.

[0053] As shown in FIG. 6, the workbench 100 is provided with a one-way limiting assembly at the bottom. The one-way limiting assembly comprises a fixed seat 520 arranged on the bottom wall of the workbench 100 and a ratchet gear 510 vertically arranged on the outer wall of the third section of the vertical rod 220. The ratchet gear 510 comprises ratchets arranged in a straight line, and the ratchets form a gear slot therebetween. The fixed seat 520 is rotatably provided with a pawl 530 matched with the ratchet gear 510. The pawl 530 is fixedly connected with the fixed seat 520 and provided with a spring 540. The spring 540 is used to provide elastic force to keep the pawl 530 pressed against the ratchet gear 510. The outer wall of the pawl 530 is fixedly connected with a rotating handle 550. The side of the pawl 530 away from the spring 540 is provided with a limiting column 560 fixedly connected with the fixed seat 520. In the normal state, the pawl 530 is embedded in the gear slot. When the ratchet gear 510 moves downward, the pawl 530 rotates away from the limiting column 560, the pawl 530 is separated from the gear slot, and the spring 540 is compressed, so that the ratchet gear 510 can normally move downward. When the ratchet gear 510 has a tendency to move upward, the pawl 530 has a tendency to rotate toward the limiting column 560, but the pawl 530 cannot rotate under the limitation of the limiting column 560, so that the ratchet gear 510 cannot move upward. Therefore, the vertical rod 220 can only move downward under the engagement of the ratchet gear 510 and the pawl 530, and cannot move upward. If the vertical rod 220 needs to move upward, the pawl 530 is driven to rotate away from the ratchet gear 510 by holding the rotating handle 550, so that the limitation of the ratchet gear 510 and the pawl 530 is released. Figures 4 to 5 and Figure 7As shown, the cavity of the mounting cylinder 210 is slidably mounted with a piston disc 223 fixedly connected to the vertical rod 220, the piston disc 223 is fixedly connected with the bottom wall inside the mounting cylinder 210, and a second rubber bellows 240 is fixedly sleeved on the outer periphery of the second section of the vertical rod 220. The second rubber bellows 240 is formed with an air cavity 211 between the outer wall and the mounting cylinder 210, and the piston disc 223 is formed with a negative pressure cavity 212 between the top wall and the mounting cylinder 210. The piston disc 223 is provided with a through hole in communication with the inside of the second rubber bellows 240 and a second air hole in communication with the negative pressure cavity 212 and the air cavity 211, and the output end of the negative pressure pump 250 is provided with an air pipe in communication with the inside of the second rubber bellows 240.

[0054] As shown in Figure 1 , Figure 5 and Figure 7 , the top of the workbench 100 is provided with a sliding groove 120 symmetrically arranged about the other diagonal line of the workbench 100 (the above-mentioned fan-shaped movable opening 110 is symmetrically arranged about one diagonal line of the workbench 100), and the sliding groove 120 is slidably mounted with an auxiliary clamping assembly for auxiliary clamping of the lamp panel.

[0055] The auxiliary clamping assembly comprises two mounting seats 410 arranged on the bottom surface of the workbench 100, the mounting seat 410 close to the side of the mounting cylinder 210 is provided with a through hole 420, the through hole 420 is slidably connected with a bracket 430, the mounting seat 410 away from the side of the mounting cylinder 210 is fixedly connected with a guide rod 440 between the bracket 430, the guide rod 440 is slidably mounted with a sliding block 450, the top of the sliding block 450 is mounted with a second clamping piece, the guide rod 440 is sleeved with a third rubber bellows 460, and the through hole 420 is connected with a connecting pipe in communication with the air cavity 211. The second clamping piece is the same in structure as the first clamping piece.

[0056] When the lamp panel is attached to the suction cup, under the action of the negative pressure pump 250, the inside of the second rubber bellows 240 will first form a negative pressure, then the space inside the first rubber bellows 230 is extracted to a negative pressure, and then the vertical rod 220 moves downward to drive the piston disc 223 to move downward to form a negative pressure in the negative pressure cavity 212. Since the space inside the first rubber bellows 230 has been extracted to a negative pressure, the negative pressure pump 250 will continuously extract the air cavity 211 and the third rubber bellows 460 to a negative pressure, so that the third rubber bellows 460 is compressed, driving the sliding block 450 and the second clamping piece on the sliding block 450 to move towards the mounting cylinder 210, and the second clamping piece adaptively assists in clamping the side of the lamp panel. A variety of sizes and shapes of lamp panels can be auxiliary clamped and positioned to make the lamp panel be fixed more stably, and further improve the application range of the device. In addition, only one negative pressure pump 250 is needed to drive the first clamping piece and the second clamping piece, saving energy.

[0057] In summary, when using the positioning fixture, the worker places the lamp panel on the top of the supporting plate 221 and makes the bottom surface of the lamp panel adhere to the suction cup. After the lamp panel adheres to the suction cup, the negative pressure pump 250 draws the space inside the second rubber bellows 240, the space inside the first rubber bellows 230, the space in the negative pressure cavity 212 and the space in the air cavity 211 to negative pressure, so that the lamp panel is subjected to a downward force, thereby driving the vertical rod 220 to move downward, the vertical rod 220 moving downward drives the first clamping piece to move in the direction close to the lamp panel to clamp the lamp panel, thereby centering the lamp panel and preliminarily clamping the side surface of the lamp panel, at the same time, the second clamping piece also moves in the direction close to the lamp panel to clamp the side surface of the lamp panel, and the suction force is combined to adsorb the bottom surface of the lamp panel, so that the lamp panel is firmly fixed.

[0058] It should be noted that, through the setting of the negative pressure pump 250 and the first rubber bellows 230, the positioning assembly is no longer rigid direct driving, but through the way of drawing negative pressure to make the vertical rod 220 move downward, thereby driving the first clamping piece and the second clamping piece to clamp the lamp panel, this way can avoid excessive clamping force and avoid the situation that the lamp panel is deformed due to excessive extrusion.

[0059] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiment, any technical solution belonging to the idea of the present application is within the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application, these improvements and decorations should also be considered as the protection scope of the present template.

[0060] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, and a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the present application. In addition, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0061] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The above describes one embodiment of the present application in detail, but the content described is only a preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still be attributed to the patent coverage of the present application.

Claims

1. A positioning fixture for LED light board welding, comprising a worktable (100), characterized in that, An adsorption assembly is installed at the center of the workbench (100). The adsorption assembly includes an installation cylinder (210) located at the center of the workbench (100). A negative pressure pump (250) that communicates with the inside of the installation cylinder (210) is fixedly installed on the workbench (100). A vertical rod (220) is slidably installed at the axis of the mounting cylinder (210). The top end of the vertical rod (220) extends upward through the mounting cylinder (210) and is fixedly connected to a support plate (221). The bottom end of the vertical rod (220) extends downward through the mounting cylinder (210) and is fixedly connected to a fastener (222). Two symmetrically arranged fan-shaped movable openings (110) are opened on the top surface of the workbench (100). A positioning component is installed in the fan-shaped movable opening (110). The positioning assembly includes a guide plate (310) located in the fan-shaped movable opening (110) and a rotating ring (340) rotatably mounted on the fixing member (222). The guide plate (310) can rotate in the fan-shaped movable opening (110) with the axis of the vertical rod (220) as the center. A guide groove (370) is provided on the guide plate (310). A first clamping member is slidably installed in the guide groove (370). A connecting rod (330) is hinged between the bottom of the first clamping member and the rotating ring (340). An adsorption component is installed on the top axis of the mounting cylinder (210). The adsorption component includes a first rubber corrugated tube (230) fixedly installed on the top surface of the mounting cylinder (210). The interior of the mounting cylinder (210) is connected to the interior of the first rubber corrugated tube (230). A suction cup is installed on the top of the first rubber corrugated tube (230), and the support plate (221) is higher than the suction cup. The workbench (100) has symmetrically arranged sliding grooves (120) at the top, and an auxiliary clamping component for auxiliary clamping of the lamp board is slidably installed in the sliding grooves (120). The auxiliary clamping assembly includes two mounting seats (410) on the bottom surface of the workbench (100). The mounting seat (410) near the mounting cylinder (210) has a through hole (420). A bracket (430) is slidably connected in the through hole (420). A guide rod (440) is fixedly connected between the mounting seat (410) away from the mounting cylinder (210) and the bracket (430). A slider (450) is slidably mounted on the guide rod (440). A second clamping member with the same structure as the first clamping member is mounted on the top of the slider (450). A third rubber corrugated tube (460) is sleeved on the guide rod (440). A connecting pipe communicating with the air chamber (211) is connected to the through hole (420).

2. The positioning fixture for LED light board welding according to claim 1, characterized in that, The outer surface of the mounting cylinder (210) is provided with an arc-shaped mounting groove (350) concentric with the mounting cylinder (210), and one end of the guide plate (310) is slidably connected in the mounting groove (350).

3. The positioning fixture for LED light board welding according to claim 1, characterized in that, The top surface of the workbench (100) is fitted with fasteners for fixing the guide plate (310) to the workbench (100).

4. The positioning fixture for LED light board welding according to claim 3, characterized in that, The fastener is a fastening bolt. The inner wall of the fan-shaped movable opening (110) away from the mounting cylinder (210) is provided with an arc groove (360). The end of the guide plate (310) away from the mounting cylinder (210) is located in the arc groove (360) and can slide in the arc groove (360). The guide plate (310) located in the arc groove (360) is provided with a threaded hole. The top surface of the worktable (100) is provided with an arc hole that communicates with the arc groove (360). After the fastening bolt is passed down through the arc hole, it is connected to the threaded hole to fix the guide plate (310) on the worktable (100).

5. The positioning fixture for LED light board welding according to claim 1, characterized in that, The first clamping member includes a clamping seat (321) slidably disposed in the guide groove (370). The clamping seat (321) is L-shaped, and its two sides are symmetrically arranged about the guide groove (370). The top of each side of the clamping seat (321) is fixedly connected to an arc-shaped mating block (322) that mates with the side wall of the lamp panel. The two arc-shaped mating blocks (322) are symmetrically arranged about the guide groove (370), and the side of the arc-shaped mating block (322) facing the guide groove (370) is an arc-shaped surface.

6. The positioning fixture for LED light board welding according to claim 1, characterized in that, The bottom of the workbench (100) is equipped with a one-way limiting component. The one-way limiting component includes a fixed seat (520) on the bottom wall of the workbench (100) and a ratchet rack (510) vertically mounted on the outer wall of the vertical rod (220). A pawl (530) that cooperates with the ratchet rack (510) is rotatably mounted on the fixed seat (520). A spring (540) is fixedly connected between the pawl (530) and the fixed seat (520). A throttle (550) is fixedly connected to the outer wall of the pawl (530). A limiting post (560) is provided on the side of the pawl (530) away from the spring (540). The limiting post (560) is fixedly connected to the fixed seat (520).

7. The positioning fixture for LED light board welding according to claim 1, characterized in that, A piston disc (223) is slidably installed inside the mounting cylinder (210) and fixedly connected to the vertical rod (220). A second rubber bellows (240) is fixedly connected between the piston disc (223) and the bottom wall inside the mounting cylinder (210). An air chamber (211) is formed between the outer wall of the second rubber bellows (240) and the mounting cylinder (210). A negative pressure chamber (212) is formed between the top wall of the piston disc (223) and the mounting cylinder (210). A through hole communicating with the interior of the second rubber bellows (240) and a second air hole communicating with the negative pressure chamber (212) and the air chamber (211) are opened on the piston disc (223). An air pipe communicating with the interior of the second rubber bellows (240) is installed at the output end of the negative pressure pump (250).

8. The positioning fixture for LED light board welding according to claim 1, characterized in that, The top and bottom walls of the mounting cylinder (210) are provided with spline grooves, and the outer wall of the vertical rod (220) has splines that cooperate with the spline grooves.

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