An unmanned aerial vehicle landing gear intelligent welding device

Abstract

The present application relates to a kind of unmanned aerial vehicle landing gear intelligent welding equipment, comprising: body, welding manipulator, fixture mounting plate, clamping head, straight line drive rod, elastic member;It further includes rotating worm gear and worm in main machine platform, lateral limit ring, threaded sleeve and axial locking sliding sleeve, axial locking sliding sleeve is fixed with main machine platform resistance pressure.This application sets up fixed seat, compression spring and contact block in clamping transmission chain, when clamping head contacts workpiece, elastic member will contact and compress with worm gear side, this process generates damping effect, so that the rotation speed of worm is slow, so as to drive clamping piece slowly, steadily extrude and fix workpiece;And compression spring is inclined, contact block slides along worm gear, cooperates with lateral limit ring, further avoids the instantaneous displacement of workpiece caused by fast, rigid clamping, ensures that unmanned aerial vehicle landing gear is accurately, stably fixed in weld position, fundamentally solves the welding position deviation problem caused by clamping action.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) landing gear welding technology, specifically to an intelligent welding device for UAV landing gear. Background Technology

[0002] Current drone landing gear welding equipment has some shortcomings in clamping, fixing, and welding operations. For example, during clamping operations, existing equipment may experience slight displacement or movement of the workpiece (drone landing gear) at the weld positioning point due to excessively fast clamping movements or poor force control. This minute deviation directly affects welding accuracy, potentially causing the weld position to deviate from design requirements and leading to a decrease in product quality. Furthermore, in the process of driving the clamping mechanism through mechanical transmission, traditional rigid transmission methods struggle to achieve force buffering and adaptive adjustment during clamping. This makes it highly susceptible to damage to the workpiece or mispositioning due to excessive, instantaneous forces in the final stage of clamping.

[0003] Therefore, an intelligent welding device for drone landing gear is proposed to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent welding device for unmanned aerial vehicle (UAV) landing gear.

[0005] The objective of this invention is achieved through the following technical solution: an intelligent welding device for UAV landing gear, comprising: a body and a welding manipulator located on a host platform of the body, a clamping mounting plate slidably fitted on the host platform, a clamping head mounted on the clamping mounting plate, a linear drive rod slidably fitted inside the host platform, the middle part of the linear drive rod being a threaded rod, anti-rotation grooves that mutually abut and slide at the ends of the two linear drive rods, and elastic elements provided on the linear drive rods;

[0006] It also includes a worm gear and a worm rotating inside the main platform. Two linear drive rods move in the middle of the worm gear. A lateral limiting ring is provided on the side of the worm gear. A threaded sleeve that is threadedly connected to the threaded rod is also provided on the worm gear. The elastic element is in abutting fit with the side of the worm gear and the lateral limiting ring. An axial locking sleeve is slidably fitted at the end of the worm. The axial locking sleeve is pressed and fixed against the main platform.

[0007] As a further description of the above technical solution:

[0008] The outer end of the linear drive rod is fixedly connected to a connecting seat that is fixedly connected to the fixture mounting plate. The top surface of the main platform has a guide sliding groove that slides with the connecting seat. A dust cover plate located above the guide sliding groove and sliding with the top surface of the main platform is fixedly connected to the connecting seat. The length of the dust cover plate is more than twice the length of the guide sliding groove, which protects the guide sliding groove from dust and dirt, effectively preventing foreign objects such as welding slag and sparks generated during the welding process from falling into the transmission components inside the equipment, and avoiding equipment failure and accuracy reduction caused by foreign object jamming and wear.

[0009] As a further description of the above technical solution:

[0010] The outer end of the linear drive rod is rectangular, and the connecting seat is L-shaped. The rectangular structure restricts the rotational freedom of the linear drive rod relative to the host platform.

[0011] As a further description of the above technical solution:

[0012] The elastic element includes a fixed base connected and fixed to the linear drive rod. A contact block that slides with the outer surface of the linear drive rod is connected to the fixed base via a compression spring. After the contact block contacts the side of the worm gear, the compression spring tilts, and the contact block moves along the side of the worm gear, thereby contacting the inner wall of the lateral limiting ring. This design effectively avoids rigid impact caused by the rapid rotation of the worm and instantaneous micro-movement of the workpiece at the weld position, and solves the fundamental problem of welding position deviation caused by the clamping process itself.

[0013] As a further description of the above technical solution:

[0014] The lateral limiting ring is connected and fixed to the transmission turntable via a connecting rod. The transmission turntable rotates within the main platform, and the inner ring of the transmission turntable is connected and fixed to the outer surface of the threaded sleeve, ensuring that the threaded sleeve rotates in place within the main platform while effectively isolating interference between the linear drive rod, the fixed seat, and the connecting rod.

[0015] As a further description of the above technical solution:

[0016] The worm gear is fixedly connected to multiple limiting discs that rotate within the main platform. The end of the worm gear extending out of the main platform has an L-shaped structure and is rotatably connected to a rocker arm via a torsion spring rod. A swing receiving groove for the rocker arm to move is provided on the side of the main platform, and a conical groove is provided at the position of the swing receiving groove to press against the axial locking sleeve.

[0017] As a further description of the above technical solution:

[0018] The axial locking slide sleeve is provided with a conical push plate at one end away from the host platform, which is in contact with the rocker arm. An elastic layer is provided between the conical push plate and the axial locking slide sleeve. Multiple connecting pins that pass through the elastic layer and enter the axial locking slide sleeve are fixedly connected to the conical push plate.

[0019] As a further description of the above technical solution:

[0020] The axial locking sleeve is engaged with the limiting disc near the conical groove.

[0021] Compared with the prior art, the advantages of the present invention are as follows:

[0022] This application incorporates a fixed seat, a compression spring, and a contact block in the clamping transmission chain. When the clamping head contacts the workpiece, the elastic element contacts and compresses the side of the worm gear. This process generates a damping effect, slowing down the rotation speed of the worm gear, thereby driving the clamping component to slowly and smoothly squeeze and fix the workpiece. Furthermore, the compression spring is tilted, and the contact block slides along the worm gear, cooperating with the lateral limiting ring, further preventing instantaneous displacement of the workpiece caused by rapid and rigid clamping. This ensures that the UAV landing gear is accurately and stably fixed at the weld position, fundamentally solving the problem of welding position deviation caused by clamping actions.

[0023] This application utilizes a locking structure comprised of a rocker arm, a conical push plate, an elastic layer, and an axial locking sleeve. Before welding, rotating the rocker arm allows the axial locking sleeve to be tightly pressed into the conical groove of the main platform, while simultaneously pressing against the limiting plate of the worm gear. This design provides an additional, mechanical, bidirectional locking mechanism on top of the worm gear's self-locking mechanism, greatly enhancing the entire transmission and clamping system's vibration resistance and anti-loosening capabilities during welding, ensuring the absolute stillness of the workpiece during welding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the host platform structure of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of the host platform structure of the present invention;

[0027] Figure 4 This is a schematic diagram showing the disassembled structure of the host platform, worm gear, and connecting seat of the present invention;

[0028] Figure 5 This is a schematic diagram of the disassembled structure of the transmission turntable and the threaded sleeve of the present invention;

[0029] Figure 6This is a schematic diagram showing the positional relationship between the two linear drive rods and the worm gear of the present invention;

[0030] Figure 7 This is a schematic diagram of the cooperation structure between the contact block, the worm gear, and the lateral limiting ring of the present invention;

[0031] Figure 8 This is a schematic diagram of the disassembled structure of the lateral limiting ring and the worm gear of the present invention;

[0032] Figure 9 This is a schematic diagram of the split structure of the two linear drive rods of the present invention;

[0033] Figure 10 This is the invention Figure 3 Schematic diagram of the structural breakdown of region A in China;

[0034] Figure 11 This is a schematic diagram of the cooperation structure between the rocker arm and the conical push plate of the present invention;

[0035] Figure 12 This is a schematic diagram showing the disassembled structure of the conical push plate, elastic layer, and axial locking sleeve of the present invention;

[0036] Figure 13 This is a cross-sectional structural diagram of the conical push plate and axial locking sleeve of the present invention.

[0037] Labeling Explanation: 1. Main Platform; 2. Welding Robot; 3. Fixture Mounting Plate; 4. Linear Drive Rod; 5. Anti-rotation Groove; 6. Worm Gear; 7. Worm; 8. Lateral Limiting Ring; 9. Threaded Sleeve; 10. Axial Locking Sleeve; 11. Connecting Seat; 12. Guide Sliding Groove; 13. Dust Cover; 14. Fixed Seat; 15. Compression Spring; 16. Contact Block; 17. Connecting Rod; 18. Transmission Turntable; 19. Limiting Plate; 20. Rocker Arm; 21. Swing Receiving Groove; 22. Conical Groove; 23. Conical Push Plate; 24. Elastic Layer; 25. Connecting Pin. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0039] like Figures 1-13The diagram shows an embodiment of an intelligent welding device for UAV landing gear provided by the present invention. It includes a body and an intelligent welding robot 2 (a plasma arc welding robot) located on the main platform 1 of the body. The body also includes a power supply, a control system, a protective cover and other devices. However, for the sake of clear display, the power supply, control system, protective cover and other auxiliary devices (conventional technologies on site) are not shown to avoid other components affecting the display effect of the core improvement points of this application. A clamping mounting plate 3 is slidably fitted on the main platform 1. The clamping mounting plate 3 is provided with mounting holes. A clamping head is installed through the mounting holes. A linear drive rod 4 is slidably fitted inside the main platform 1. The middle part of the linear drive rod 4 is a threaded rod. The ends of the two linear drive rods 4 are provided with anti-rotation grooves 5 for mutual pressing and sliding. An elastic element is provided on the linear drive rod 4.

[0040] It also includes a worm gear 6 and a worm 7 that rotate within the main platform 1. Two linear drive rods 4 move in the middle of the worm gear 6. A lateral limiting ring 8 is provided on the side of the worm gear 6. A threaded sleeve 9 that is threadedly connected to the threaded rod is also provided on the worm gear 6. The elastic element is in abutting fit with the side of the worm gear 6 and the lateral limiting ring 8. An axial locking sleeve 10 is slidably fitted at the end of the worm 7. The axial locking sleeve 10 is pressed and fixed against the main platform 1.

[0041] A connecting seat 11, which is fixedly connected to the fixture mounting plate 3, is fixedly connected to the outer end of the linear drive rod 4. A guide sliding groove 12, which is slidably engaged with the connecting seat 11, is opened on the top surface of the main platform 1. A dust cover plate 13, which is located above the guide sliding groove 12 and slidably engaged with the top surface of the main platform 1, is fixedly connected to the connecting seat 11. The length of the dust cover plate 13 is more than twice the length of the guide sliding groove 12. The connecting seat 11 transmits the movement of the linear drive rod 4 to the fixture mounting plate 3, which moves along the guide sliding groove 12 on the main platform 1. The dust cover plate 13, which moves synchronously with the connecting seat 11, is more than twice the length of the guide sliding groove 12 and is designed to always cover the guide sliding groove 12.

[0042] The outer end of the linear drive rod 4 has a rectangular structure, which ensures that the linear drive rod 4 moves smoothly and will not rotate. The connecting seat 11 has an L-shaped structure. The rectangular cross-section of the linear drive rod 4 ensures that it will not rotate during linear motion, thereby ensuring the accuracy and smoothness of the linear motion driven by the thread and eliminating the possible torsion effect on the clamping accuracy.

[0043] The elastic element includes a fixed base 14 connected and fixed to the linear drive rod 4. A contact block 16, which slides on the outer surface of the linear drive rod 4, is connected to the fixed base 14 via a compression spring 15. Initially, the contact block 16 is a certain distance from the side wall of the worm gear 6. When the clamping head contacts the workpiece and the clamping force continues to increase, the contact block 16 moves forward and contacts the side of the worm gear 6. Under the action of the compression spring 15, the contact block 16 slides along the side wall of the worm gear 6 until it finally abuts against the inner wall of the lateral limiting ring 8. During this process, the compression spring 15 provides damping force and causes tilting.

[0044] After the contact block 16 contacts the side of the worm wheel 6, the compression spring 15 tilts, and the contact block 16 moves along the side of the worm wheel 6, thereby contacting the inner wall of the lateral limiting ring 8. When the compression spring 15 tilts and compresses, it provides continuous damping for the continued rotation of the worm 7, slowing down its rotation speed and driving the clamping member to gently and flexibly press the workpiece.

[0045] The lateral limiting ring 8 is connected and fixed to the transmission turntable 18 via the connecting rod 17. The transmission turntable 18 rotates within the main platform 1. The inner ring of the transmission turntable 18 is connected and fixed to the outer surface of the threaded sleeve 9. The transmission turntable 18 ensures that the threaded sleeve 9 rotates in its original position within the main platform 1. It also cooperates with the connecting rod 17 and the worm gear 6 to drive the threaded sleeve 9 to rotate in its original position. During the circular motion of the connecting rod 17, it will not touch the contact block 16, the fixed seat 14, or the compression spring 15, so that the worm gear 6 drives the threaded sleeve 9 to rotate in its original position.

[0046] Multiple limiting disks 19 that rotate within the main platform 1 are fixedly connected to the worm gear 7. The end of the worm gear 7 extending out of the main platform 1 has an L-shaped structure and is rotatably connected to a rocker arm 20 via a torsion spring rod. A swing receiving groove 21 for the rocker arm 20 to move is provided on the side of the main platform 1. A conical groove 22 that presses against the axial locking sleeve 10 is provided at the position of the swing receiving groove 21.

[0047] The worm 7 has multiple grooves on its outer surface, and a sliding plate that slides with the grooves is fixedly connected to the through hole in the middle of the axial locking sleeve 10. This ensures that the rotation of the worm 7 drives the axial locking sleeve 10 to rotate without affecting the sliding of the axial locking sleeve 10.

[0048] Furthermore, the end of the axial locking sleeve 10 away from the main platform 1 is provided with a conical push plate 23 that presses against the rocker arm 20. An elastic layer 24 is provided between the conical push plate 23 and the axial locking sleeve 10. Multiple connecting pins 25 that pass through the elastic layer 24 and enter the axial locking sleeve 10 are fixedly connected to the conical push plate 23. The axial locking sleeve 10 presses against the limiting plate 19 near the conical groove 22.

[0049] The front end of the axial locking sleeve 10 engages with the inclined surface of the tapered groove 22 to generate a huge radial static friction force (mechanical amplification), and the rear end presses against the limiting plate 19 to eliminate the axial movement of the worm 7. Based on the unidirectional self-locking of the worm gear 7, an external and controllable additional locking force is applied to keep the entire structure absolutely still under welding vibration and ensure the stable clamping position of the workpiece. The elastic layer 24 between the rocker arm 20 and the axial locking sleeve 10 can balance the pressure distribution and provide a certain buffer to prevent micro-stress concentration and wear caused by pure rigid contact, thus ensuring long-term tight locking.

[0050] In this application, a rough surface treatment is provided between the outer wall of the axial locking sleeve 10 and the inner wall of the conical groove 22 to ensure the friction between the two. There is end face friction between the axial locking sleeve 10 and the limiting plate 19. The contact surface between the end of the rocker arm 20 and the conical push plate 23 is also set as a friction contact surface.

[0051] Working principle: First, rotate the rocker arm 20 so that the end of the rocker arm 20 is switched from being pressed against the conical push plate 23 to being away from the end of the rocker arm 20 and away from the conical push plate 23, thereby releasing the tight pressure of the axial locking sleeve 10 on the conical groove 22, and thus releasing the restriction of the worm gear 7.

[0052] Then, the rocker arm 20 is made to make a circular motion, which drives the worm 7 to rotate in its original position. The rotation of the worm 7 drives the worm wheel 6 to rotate in its original position. The worm wheel 6 drives the threaded sleeve 9 to rotate in its original position through the connecting rod 17. The threaded sleeve 9, which rotates in its original position, interacts with the threaded rod of the linear drive rod 4. Due to the cooperation of the anti-rotation grooves 5 at both ends of the linear drive rod 4, the rotation of the two linear drive rods 4 is blocked (the rotation directions of the two linear drive rods 4 are opposite, which causes the two linear drive rods 4 to press against each other and cannot rotate). The outer end of the linear drive rod 4 is a rectangular structure, which further ensures that the linear drive rods 4 move smoothly towards each other, thereby mobilizing the connecting seat 11 to move smoothly along the guide sliding groove 12, so that the clamp mounting plates 3 move closer to each other.

[0053] It is worth noting that when the connecting seat 11 slides along the guide sliding groove 12, the dust cover plate 13 on the connecting seat 11 moves synchronously, and the dust cover plate 13 always fits against the top surface of the host platform 1, sealing the guide sliding groove 12 so that the guide sliding groove 12 can never leak out, thus preventing welding slag from entering during the welding process.

[0054] Then, continue to rotate the rocker arm 20 in a circular motion to bring the two clamp mounting plates 3 closer together and gradually bring the clamping heads on the clamp mounting plates 3 into contact with the UAV landing gear. At this time, the contact block 16 contacts the side of the worm gear 6, and the compression spring 15 is compressed, which in turn reacts to the worm 7, causing the rotation force of the worm 7 to change and thus slowing down the rotation speed of the worm 7. This prevents the clamping heads from quickly squeezing the UAV landing gear due to the rapid rotation of the worm 7, which would cause slight movement at the weld position of the UAV landing gear and thus lead to welding position deviation.

[0055] As the clamping head slowly squeezes the drone landing gear, the compression spring 15 is under great pressure, and the compression spring 15 tilts. It tilts slightly as the worm gear 6 rotates, and finally the contact block 16 presses against the lateral limiting ring 8 to avoid excessive squeezing.

[0056] Finally, by rotating the rocker arm 20, the end of the rocker arm 20 rotates towards the conical push plate 23. The end of the rocker arm 20 presses against the conical push plate 23, and the elastic layer 24 is pressed against it. This causes the axial locking sleeve 10 to move along the worm 7 into the conical groove 22. The axial locking sleeve 10 is tightly pressed against the conical groove 22, and at the same time, the axial locking sleeve 10 presses against the limiting plate 19, further ensuring the fixing effect of the worm 7 (based on the self-locking ability of the worm 7 and the worm wheel 6), thereby ensuring the position of the UAV landing gear fixed by the clamping head, which is convenient for the welding robot to weld the UAV landing gear.

Claims

1. A smart welding device for unmanned aerial vehicle (UAV) landing gear, comprising: The body and the welding robot (2) located on the host platform (1) of the body are characterized in that: a clamping mounting plate (3) is slidably fitted on the host platform (1), a clamping head for clamping and fixing the landing gear of the UAV is installed on the clamping mounting plate (3), a linear drive rod (4) is slidably fitted inside the host platform (1), the middle part of the linear drive rod (4) is a threaded rod, the ends of the two linear drive rods (4) are provided with anti-rotation grooves (5) that press against each other and slide, and an elastic element is provided on the linear drive rod (4); It also includes a worm gear (6) and a worm (7) that rotate within the main platform (1). Two linear drive rods (4) move in the middle of the worm gear (6). A lateral limiting ring (8) is provided on the side of the worm gear (6). A threaded sleeve (9) that is threadedly connected to the threaded rod is also provided on the worm gear (6). The elastic element is pressed against the side of the worm gear (6) and the lateral limiting ring (8). An axial locking sleeve (10) is slidably fitted at the end of the worm (7). The axial locking sleeve (10) is pressed against and fixed to the main platform (1).

2. The intelligent welding equipment for UAV landing gear according to claim 1, characterized in that: The outer end of the linear drive rod (4) is fixedly connected to a connecting seat (11) that is fixedly connected to the clamp mounting plate (3). The top surface of the host platform (1) is provided with a guide sliding groove (12) that slides with the connecting seat (11). A dust cover plate (13) located above the guide sliding groove (12) and sliding with the top surface of the host platform (1) is fixedly connected to the connecting seat (11). The length of the dust cover plate (13) is more than twice the length of the guide sliding groove (12).

3. The intelligent welding equipment for UAV landing gear according to claim 2, characterized in that: The outer end of the linear drive rod (4) is rectangular, and the connecting seat (11) is L-shaped.

4. The intelligent welding equipment for UAV landing gear according to claim 1, characterized in that: The elastic element includes a fixed seat (14) that is fixed to the linear drive rod (4), and a contact block (16) that slides with the outer surface of the linear drive rod (4) is connected to the fixed seat (14) by a compression spring (15).

5. The intelligent welding equipment for UAV landing gear according to claim 4, characterized in that: After the contact block (16) contacts the side of the worm wheel (6), the compression spring (15) tilts and the contact block (16) moves along the side of the worm wheel (6) to contact the inner wall of the lateral limiting ring (8).

6. The intelligent welding equipment for UAV landing gear according to claim 1, characterized in that: The lateral limiting ring (8) is connected and fixed to the transmission turntable (18) via a connecting rod (17). The transmission turntable (18) rotates within the host platform (1). The inner ring of the transmission turntable (18) is connected and fixed to the outer surface of the threaded sleeve (9).

7. The intelligent welding equipment for UAV landing gear according to claim 1, characterized in that: The worm (7) is fixedly connected to a plurality of limiting disks (19) that rotate within the host platform (1). The end of the worm (7) extending out of the host platform (1) is L-shaped and is rotatably connected to a rocker arm (20) via a torsion spring rod. A swing receiving groove (21) for the rocker arm (20) to move is provided on the side of the host platform (1). A conical groove (22) is provided at the position of the swing receiving groove (21) to press against the axial locking sleeve (10).

8. The intelligent welding equipment for UAV landing gear according to claim 7, characterized in that: The axial locking sleeve (10) is provided with a conical push plate (23) at one end away from the host platform (1) and is in contact with the rocker arm (20). An elastic layer (24) is provided between the conical push plate (23) and the axial locking sleeve (10). Multiple connecting pins (25) are fixedly connected to the conical push plate (23), passing through the elastic layer (24) and into the axial locking sleeve (10).

9. The intelligent welding equipment for UAV landing gear according to claim 7, characterized in that: The axial locking sleeve (10) is in abutting engagement with the limiting disc (19) located near the conical groove (22).

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