AGV synchronous pulley-based anti-explosion precision lifting device

Abstract

The present application relates to the production field of explosion-proof AGV, and particularly to an explosion-proof precise lifting device for AGV based on synchronous pulley, which comprises a navigation guide vehicle, a bearing plate, a gravity sensor, a mounting bracket, a supporting piece, a precise lifting assembly and an anti-overweight assembly. The navigation guide vehicle is used to drive the device to move. The present application is provided with the precise lifting assembly, which uses the synchronous pulley to make the whole mechanism and the ball screw have high synchronism to avoid jamming. The ball screw has high precision, stable transmission and mute performance. Compared with the gear and rack transmission, the present application has higher precision and better synchronism. The synchronous pulley can ensure the synchronous rotation of the nuts of the ball screws, so that the lifting of the bearing plate is more stable and accurate, and the precision decline caused by asynchronous transmission is avoided. When the device is lifted upward, the cleaning assembly can automatically trigger the cleaning action without additional operation, saving manpower and time.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof AGV production, specifically an explosion-proof precision lifting device for AGVs based on synchronous pulleys. Background Technology

[0002] In a chemical plant, when hazardous chemicals need to be moved to specific locations, explosion-proof precision lifting devices are required. These devices can prevent the hazardous chemicals from exploding while placing them in the correct positions. Furthermore, they need to be moved in conjunction with synchronous pulleys to ensure the safety and efficiency of the entire production process.

[0003] Chinese utility model patent CN218290309U, entitled "A Lifting Device for AGV and AGV," describes a lifting device for an AGV comprising: a mounting base, a lifting base, a movably mounted on the mounting base, and a floating support unit. The floating support unit includes a support platform and a floating return mechanism. The support platform is positioned above the lifting base and is vertically slidably and limitedly connected to the lifting base. This utility model uses gear and rack meshing to drive the lifting base up and down. However, after prolonged use, wear may occur, leading to decreased accuracy and even relatively high noise levels. Furthermore, if dust enters the meshing area of ​​the gear and rack, it can exacerbate wear, further reducing the accuracy and synchronization of the gear and rack transmission. Additionally, when the workpiece is overweight, it can place an excessive load on the meshing of the gear and rack, causing increased wear on the gear and rack teeth, and even damage such as tooth deformation or breakage. This can also disrupt the precise and smooth meshing between the gears.

[0004] Therefore, it is necessary to propose an explosion-proof precision lifting device for AGVs based on synchronous pulleys to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an explosion-proof precision lifting device for AGVs based on synchronous pulleys. This solves the technical problems of existing gear and rack transmissions that drive the lifting base up and down, which may experience wear and tear after prolonged use, leading to decreased precision and even relatively high noise. Furthermore, if dust enters the meshing part of the gear and rack, it will cause accelerated wear of the gears and racks, further reducing the precision and synchronization of the gear and rack transmission.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: The technical solution adopted by this invention to solve its technical problem is: an explosion-proof precision lifting device for AGV based on synchronous pulleys, including a navigation guide vehicle, a load-bearing plate, a gravity sensor, a mounting bracket, a support component, a precision lifting assembly, and an anti-overload assembly. The navigation guide vehicle is used to drive the device to move. The load-bearing plate is located on the top of the navigation guide vehicle and is used to support the workpiece. The gravity sensor is located on one side of the top of the gravity sensor and is used to detect the weight of the workpiece in real time. The mounting bracket is located inside the navigation guide vehicle and has a concave structure, which is used to support and fix the entire system. The support component is located above the mounting bracket and is used to support the load-bearing plate. The precision lifting assembly is located on the mounting bracket and is used to precisely lift and lower the load-bearing plate. The anti-overload assembly is located inside the navigation guide vehicle and is used to prevent the load-bearing plate from being overloaded.

[0007] Preferably, the precision lifting assembly includes a drive wheel rotatably connected to the left side of the mounting bracket. An explosion-proof motor is installed inside the navigation vehicle. The output of the explosion-proof motor is connected to the drive wheel via a reducer. A rectangular array of synchronous pulleys is rotatably connected to the top surface of the mounting bracket. Each set of synchronous pulleys has a nut installed inside, and the internal thread of the nut is connected to a vertically arranged ball screw. Each set of ball screws is installed below the support plate. A synchronous belt is drively connected to the outer side of each set of synchronous pulleys. Symmetrically distributed guide wheels are rotatably connected to the top left side of the mounting bracket. The guide wheels are in close contact with the side of the synchronous belt facing away from the drive wheel. A synchronous belt tensioning pulley is located at the top of the ball screw, between the front and rear ends, passing through one side of the synchronous belt. A cleaning assembly for simultaneously blowing away impurities from the synchronous pulleys and the synchronous belt is installed on the top of the mounting bracket.

[0008] Preferably, the cleaning assembly includes a fixing plate bolted to the right side of the mounting bracket. Two fixing sleeves are installed at the bottom of the fixing plate, and piston plates are slidably connected to the lower parts of the two fixing sleeves. The piston plate at the rear end extends out below the fixing sleeve, and the piston plate at the front end extends into the interior of the fixing sleeve. Gear teeth are installed on opposite sides of the two piston plates. A mounting bracket is installed on the lower right side of the mounting bracket, and a linkage wheel is installed below the mounting bracket. Two gear teeth 2141 are respectively located on the front and rear sides of the linkage wheel 216 and both mesh with the linkage wheel 216. A connecting plate is installed below the piston plate at the rear end. Two air inlet pipes communicating with the interior of the fixing sleeves are installed on the top of the fixing plate, and the end of the air inlet pipe away from the fixing plate extends into the air outlet assembly.

[0009] Preferably, the air outlet assembly includes a connecting air plate installed on the top of the mounting bracket, a first arc-shaped air outlet plate installed at both ends of the air inlet pipe, a second air outlet connecting plate installed on the left side of the first arc-shaped air outlet plate, and a second arc-shaped air outlet plate installed on the left side of the second air outlet connecting plate. The air inlet pipe, the first arc-shaped air outlet plate, and the second arc-shaped air outlet plate are interconnected.

[0010] Preferably, branch pipes are installed inside both the first and second arc-shaped air outlet plates, and air supply pipes arranged in a linear array are opened on the inner side of both the first and second arc-shaped air outlet plates. The air supply pipes are inclined downwards, and the air supply pipes are connected to the branch pipes. The side of the branch pipe facing away from the air supply pipe is connected to the air inlet pipe, and a dustproof net is installed at the outlet end of the air supply pipe.

[0011] Preferably, a fixed seat is installed at the top of both the front and rear ends of the mounting bracket, and an adjusting rod distributed laterally is threaded to the middle of the fixed seat. An L-shaped moving block is installed on the opposite side of the two adjusting rods. The vertical end of the L-shaped moving block is connected to the mounting bracket by a slide rail. The synchronous belt tensioning wheel is rotatably connected above the vertical end of the L-shaped moving block.

[0012] Preferably, the anti-overweight component includes a support base installed on the navigation and guidance vehicle. Support rods are installed at both the front and rear ends of the support base. A support plate is installed on the top of the support rods. The support plate has a hollow structure. A first linkage groove is formed circumferentially inside the support plate. A control wheel arranged vertically is rotatably connected inside the first linkage groove. An anti-overweight rod is installed below the support component. A control wheel rack is installed circumferentially on the outer side of the anti-overweight rod. The control wheel rack meshes with the control wheel. The anti-overweight rod and the control wheel rack slide through the middle of the support plate. The inner side of the support plate has a second linkage groove along the circumferential direction and located between the spaced control wheels. A pusher is slidably connected to the second linkage groove along the radial direction of the support plate. A pressing component is provided on the side of the pusher facing the control wheel. A positioning rod is installed on the top of the pusher. A rotating plate is slidably connected to the outer side of the support plate. A limiting groove is provided on the top of the rotating plate, through which the positioning rod can slide. Two connecting arc plates are installed below the rotating plate. A rotatable rotating plate is installed below the connecting arc plates. The rotating plate is rotatably connected inside the navigation and guidance vehicle.

[0013] Preferably, the extrusion assembly includes an inclined extrusion bar, with an extrusion head arranged in a ring array mounted on one end of the extrusion bar facing away from the pusher. The support plate has a slot between the first linkage slot and the second linkage slot. The end of the extrusion head facing away from the extrusion bar slides through the slot and then fits tightly against the side wall of the control wheel. A reset spring rod arranged in a ring array is installed between the outer side of the extrusion bar facing away from the pusher and the side wall of the second linkage slot.

[0014] Preferably, a soundproof cover is installed below the support member and outside the anti-overweight rod. The connecting plate is installed on the left side of the soundproof cover. The top of the soundproof cover slides through the top of the mounting bracket. A rotating groove is provided below the soundproof cover. The connecting arc plate is slidably connected inside the rotating groove. Telescopic grooves are provided at the left and right ends of the rotating groove and a sound insulation plate is connected inside the telescopic groove through a sliding rail. The sound insulation plate is tightly attached to the side wall of the connecting arc plate. An expansion spring is installed between the side wall of the telescopic groove and the sound insulation plate.

[0015] Beneficial effects: (1) By setting up a precision lifting component, the present invention uses a synchronous pulley to make the whole mechanism and ball screw have extremely high synchronization to avoid jamming. The ball screw has high precision, smooth transmission and quiet performance. Compared with gear and rack transmission, it has higher precision and better synchronization. The synchronous pulley can ensure that the nuts of multiple ball screws rotate synchronously, so that the lifting of the bearing plate is more stable and precise. There will be no problem of precision reduction due to asynchronous transmission. In addition, with the cooperation of the cleaning component, the cleaning action can be automatically triggered when the device is lifted upward, without additional operation, saving manpower and time, effectively removing impurities on the synchronous pulley and synchronous belt, reducing meshing error caused by impurities, and ensuring the accuracy of transmission. (2) By setting up an anti-overload component, after the bearing plate detects an overload signal, the external terminal automatically controls the electric push rod to start, and automatically fixes the control wheel through the rotating disk, rotating disk, positioning rod, pushing component and pressing component. The anti-overload rod is restricted to move downward by fixing the four sets of control wheels. The characteristics of the ball screw combined with the protection of the anti-overload component can maintain high precision even after long-term use, ensuring the accuracy of lifting and movement. In addition, by setting up a soundproof cover, sound insulation plate and expansion spring, the noise of the control wheel rack and control wheel transmission is limited inside the soundproof cover, reducing noise pollution. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a top view of the precision lifting component of the present invention; Figure 3 This is a schematic diagram of the precision lifting component of the present invention; Figure 4 This is a schematic diagram of the anti-overweight component of the present invention; Figure 5 This is a schematic diagram of the cleaning component of the present invention; Figure 6 This is a cross-sectional view of the connecting air plate of the present invention; Figure 7 This is a cross-sectional view of the support base of the present invention; Figure 8 This is a schematic diagram of the anti-overweight bar of the present invention; Figure 9 This is a schematic diagram of the support base and rotating disk of the present invention; Figure 10 This is a schematic diagram of the support plate of the present invention; Figure 11 This is a schematic diagram of the pusher component of the present invention; Figure 12 This is a schematic diagram of the extrusion head of the present invention.

[0018] In the diagram: 1. Navigation and guidance vehicle; 12. Load-bearing plate; 13. Gravity sensor; 14. Mounting bracket; 15. Support component; 16. Explosion-proof battery box; 2. Precision lifting assembly; 21. Drive wheel; 22. Explosion-proof motor; 23. Synchronous pulley; 231. Nut; 24. Ball screw; 25. Synchronous belt; 26. Guide wheel; 27. Synchronous belt tension pulley; 28. Fixed seat; 29. ​​Adjusting rod; 291. L-shaped moving block; 211. Cleaning assembly; 212. Fixed plate; 213. Fixed sleeve; 214. Piston plate; 2141. Gear tooth; 215. Mounting bracket; 216. Link wheel; 217. Connecting plate; 218. Air inlet pipe; 2101. Connecting air plate; 2102. First arc-shaped air outlet plate; 2103. Second air outlet connecting plate; 2104. Second arc-shaped air outlet plate; 221. Branch pipe; 222. Air supply pipe; 223. Dustproof net; 3. Overweight prevention component; 31. Support base; 32. Support rod; 33. Support plate; 34. First linkage groove; 35. Control wheel; 36. Overweight prevention rod; 361. Control wheel rack; 362. Soundproof cover; 363. Rotating groove; 364. Sound insulation plate; 365. Expansion spring; 37. Second linkage groove; 38. Pushing component; 39. Extrusion assembly; 391. Extrusion inclined bar; 392. Extrusion head; 3921. Groove; 393. Return spring rod; 310. Positioning rod; 311. Rotating plate; 312. Connecting arc plate; 313. Rotating plate. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-4 As shown, an explosion-proof precision lifting device for an AGV based on synchronous pulleys includes a navigation and guidance vehicle 1, a load-bearing plate 12, a gravity sensor 13, a mounting bracket 14, a support component 15, a precision lifting assembly 2, and an overload prevention assembly 3. The navigation and guidance vehicle 1 is used to move the device. The load-bearing plate 12 is located on the top of the navigation and guidance vehicle 1 and is used to support the workpiece. The gravity sensor 13 is located on one side of the top of the navigation and guidance vehicle 1 and is used to detect the weight of the workpiece in real time. The mounting bracket 14 is located inside the navigation and guidance vehicle 1 and has a concave structure, used to support and fix the entire system. The support component 15 is located above the mounting bracket 14 and is used to support the load-bearing plate 12. The precision lifting assembly 2 is located on the mounting bracket 14 and is used to precisely lift and lower the load-bearing plate 12. The overload prevention assembly 3 is located inside the navigation and guidance vehicle 1 and is used to prevent the load-bearing plate 12 from being overloaded. The precision lifting assembly 2 includes components rotatably connected to the left side of the mounting bracket 14. The drive wheel 21 on the side, the navigation and guidance vehicle 1 is equipped with an explosion-proof motor 22, the output end of the explosion-proof motor 22 is connected to the drive wheel 21 through a reducer, the top surface of the mounting bracket 14 is rotatably connected with a rectangular array of synchronous pulleys 23, each set of synchronous pulleys 23 is equipped with a nut 231, and the internal thread of the nut 231 is connected to a vertically arranged ball screw 24, each set of ball screws 24 is installed below the support plate 12, the outer side of each set of synchronous pulleys 23 is connected to a synchronous belt 25, the top left side of the mounting bracket 14 is rotatably connected with symmetrically distributed guide wheels 26, the guide wheels 26 are close to the side of the synchronous belt 25 facing away from the drive wheel 21, the top of the ball screw 24 is located in the middle of the front and rear ends and a synchronous belt tensioning pulley 27 is set through one side of the synchronous belt 25, and the top of the mounting bracket 14 is equipped with a cleaning component 211 for blowing away impurities from the synchronous pulleys 23 and the synchronous belt 25 at the same time.

[0021] It should be noted that the navigation and guidance vehicle 1 is responsible for moving the entire device to the designated position. When lifting is required, the explosion-proof motor 22 starts and drives the drive wheel 21 to rotate through the reducer. The rotation of the drive wheel 21 drives each synchronous pulley 23 to rotate synchronously through the synchronous belt 25. The nut 231 inside the synchronous pulley 23 rotates accordingly. Since the nut 231 is threadedly connected to the ball screw 24, the rotation of the nut 231 causes the ball screw 24 to move vertically upward, thereby driving the bearing plate 12 to rise and achieve the lifting function. The guide wheel 26 is used to maintain the tension of the synchronous belt 25 and ensure stable transmission. The synchronous belt tensioning wheel 27 ensures that the synchronous belt 25 is in an appropriate tension state. The cleaning component 211 can blow away impurities from the synchronous pulleys 23 and the synchronous belt 25 to clean them and maintain smooth transmission.

[0022] This invention, by setting up a precision lifting component 2 and using a synchronous pulley, enables the entire mechanism and the four sets of ball screws 24 to have extremely high synchronization, avoiding jamming. The ball screws 24 have high precision, smooth transmission, and quiet performance. Compared with gear and rack transmission, they have higher precision and better synchronization. The synchronous pulley can ensure that the nuts 231 of multiple ball screws 24 rotate synchronously, thereby making the lifting of the bearing plate 12 more stable and precise, and avoiding the problem of decreased precision due to asynchronous transmission.

[0023] It is worth noting that the gravity sensor 13 detects the weight of the workpiece on the support plate 12 in real time. When the weight of the workpiece exceeds the set threshold, the anti-overweight component 3 is triggered to limit the downward displacement of the anti-overweight rod and prevent the support plate from falling and being damaged under overweight conditions. When the weight of the workpiece is within the allowable range, the anti-overweight component 3 is in the unlocked state.

[0024] like Figures 2-4 As shown, the cleaning assembly 211 includes a fixing plate 212 bolted to the right side of the mounting bracket 14. Two fixing sleeves 213 are installed at the bottom of the fixing plate 212. Piston plates 214 are slidably connected to the bottom of the two fixing sleeves 213. The piston plate 214 at the rear end extends out below the fixing sleeve 213, and the piston plate 214 at the front end extends into the interior of the fixing sleeve 213. Gear teeth 2141 are installed on opposite sides of the two piston plates 214. A mounting bracket 215 is installed on the lower right side of the mounting bracket 14. A linkage wheel 216 is installed below the mounting bracket 215. The two gear teeth 2141 mesh at the front and rear ends of the linkage wheel 216. A connecting plate 217 is installed below the piston plate 214 at the rear end. Two air inlet pipes 218 connected to the interior of the fixing sleeves 213 are installed on the top of the fixing plate 212. The end of the air inlet pipe 218 away from the fixing plate 212 extends into the air outlet assembly.

[0025] It should be noted that when the device is lifted upwards, the connecting plate 217 will drive the piston plate 214 connected to it to move upwards. The piston plate 214 will push inside the fixed sleeve 213 connected to it. The gas inside the fixed sleeve 213 will be output through the air inlet pipe 218 located at the rear end, and then flow into the air outlet assembly. At the same time, the piston plate 214 located at the front end will extend out of the fixed sleeve 213 connected to it with the cooperation of the linkage wheel 216. Therefore, under the push of the gas, the two piston plates 214 will reciprocate. The connecting plate 217 below the piston plate 214 at the rear end will move accordingly, thereby cleaning the synchronous pulley 23 and the synchronous belt 25 with air jets, removing impurities, reducing the meshing error of the synchronous pulley 23 and the synchronous belt 25 caused by impurities, and ensuring the accuracy of the device during lifting and movement.

[0026] like Figure 4 and Figure 6 As shown, the air outlet assembly includes a connecting air plate 2101 installed on the top of the mounting bracket 14, a first arc-shaped air outlet plate 2102 installed at both ends of the air inlet pipe 218, a second air outlet connecting plate 2103 installed on the left side of the first arc-shaped air outlet plate 2102, and a second arc-shaped air outlet plate 2104 installed on the left side of the second air outlet connecting plate 2103. The air inlet pipe 218, the first arc-shaped air outlet plate 2102, and the second arc-shaped air outlet plate 2104 are interconnected.

[0027] It should be noted that when the piston plate 214 in the cleaning component 211 moves, it pushes the gas in the fixed sleeve 213 through the air inlet pipe 218 into the air outlet component. After the gas enters the air inlet pipe 218, it flows to the first arc-shaped air outlet plate 2102 at the front and rear ends respectively, and then enters the second arc-shaped air outlet plate 2104 through the second air outlet connecting plate 2103. Finally, the gas is blown out from the first arc-shaped air outlet plate 2102 and the second arc-shaped air outlet plate 2104 to perform jet cleaning on the synchronous pulley 23 and the synchronous belt 25. The first arc-shaped air outlet plate 2102 and the second arc-shaped air outlet plate 2104 are arc-shaped structures, which can expand the air outlet range and more comprehensively cover the synchronous pulley 23 and the synchronous belt 25, ensuring that impurities are fully cleaned.

[0028] like Figures 4-5 As shown, branch pipes 221 are installed inside the first arc-shaped air outlet plate 2102 and the second arc-shaped air outlet plate 2104. The inner sides of the first arc-shaped air outlet plate 2102 and the second arc-shaped air outlet plate 2104 are provided with air supply pipes 222 arranged in a linear array. The air supply pipes 222 are inclined downwards. The air supply pipes 222 and the branch pipes 221 are connected. The side of the branch pipes 221 facing away from the air supply pipes 222 is connected to the air inlet pipe 218. A dustproof net 223 is installed at the outlet end of the air supply pipes 222.

[0029] It should be noted that when the gas enters the air outlet assembly from the air inlet pipe 218, it will flow through the branch pipe 221 to the various air supply pipes 222 in the first arc-shaped air outlet plate 2102 and the second arc-shaped air outlet plate 2104 respectively. Since the air supply pipes 222 and the branch pipes 221 are connected, the gas can be blown out from the linear array of air supply pipes 222 to perform jet cleaning on the synchronous pulley 23 and the synchronous belt 25. The dustproof net 223 can prevent dust and other impurities from entering the air outlet assembly through the air supply pipes 222, avoiding blockage or affecting the cleaning effect.

[0030] It is worth noting that when the gas is blown out from the air supply pipe 222, the airflow direction will also be tilted downwards accordingly because the air supply pipe 222 is inclined downwards. Such airflow can directly act on the bottom area of ​​the synchronous pulley 23 and the synchronous belt 25, giving the impurities a downward force, making it easier for them to detach from the tooth grooves or surface of the synchronous pulley 23 and the synchronous belt 25.

[0031] like Figure 3 As shown, a fixed seat 28 is installed at the top of the front and rear ends of the mounting bracket 14. An adjusting rod 29 distributed laterally is threaded to the middle of the fixed seat 28. An L-shaped moving block 291 is installed on the opposite side of the two adjusting rods 29. The vertical end of the L-shaped moving block 291 is connected to the mounting bracket 14 by a slide rail. The synchronous belt tension wheel 27 is rotatably connected above the vertical end of the L-shaped moving block 291.

[0032] It should be noted that by rotating the adjusting rod 29, which is threadedly connected to the fixed base 28, the adjusting rod 29 will move laterally in the middle of the fixed base 28. The movement of the adjusting rod 29 will drive the L-shaped moving block 291 to slide along the slide rail on the mounting bracket 14. The timing belt tension wheel 27 is rotatably connected above the vertical end of the L-shaped moving block 291. The movement of the L-shaped moving block 291 will change the position of the timing belt tension wheel 27, thereby realizing the tensioning or loosening adjustment of the timing belt 25. The tension of the timing belt can be flexibly adjusted according to actual needs to adapt to different working conditions and requirements.

[0033] like Figures 7-11 As shown, the overweight prevention component 3 includes a support base 31 installed on the navigation and guidance vehicle 1. Support rods 32 are installed at the front and rear ends of the support base 31. A support plate 33 is installed on the top of the support rods 32. The support plate 33 has a hollow structure. A first linkage groove 34 is opened circumferentially inside the support plate 33. A control wheel 35 arranged vertically is rotatably connected inside the first linkage groove 34. An overweight prevention rod 36 is installed below the support member 15. A control wheel rack 361 is installed circumferentially on the outer side of the overweight prevention rod 36. The control wheel rack 361 and the control wheel 35 mesh with each other. The overweight prevention rod 36 and the control wheel rack 361 slide through the middle of the support plate 33. A second linkage is opened circumferentially on the inner side of the support plate 33 between the spaced control wheels 35. Inside the second linkage groove 37, a pusher 38 is slidably connected radially along the support plate 33. A pressing assembly 39 is mounted on the side of the pusher 38 facing the control wheel 35. A positioning rod 310 is installed on the top of the pusher 38. A rotating plate 311 is slidably connected to the outside of the support plate 33. A limiting groove is opened on the top of the rotating plate 311, through which the positioning rod 310 can slide. Two connecting arc plates 312 are installed below the rotating plate 311. A rotatable rotating plate 313 is installed below the connecting arc plates 312. The rotating plate 313 is rotatably connected inside the navigation and guidance vehicle 1. An electric push rod for driving the rotating plate 313 is installed in the middle of the navigation and guidance vehicle 1. The electric push rod and the gravity sensor 13 are electrically connected through an external terminal.

[0034] It should be noted that when the cargo on the navigation and guidance vehicle 1 is overweight, the gravity sensor 13 will detect the overweight signal and transmit it to the external terminal. After receiving the signal, the terminal will control the electric push rod to start. The electric push rod will push the rotating disk 313 to rotate. The rotating disk 313 drives the rotating disk 311 to slide through the connecting arc plate 312. The limiting groove at the top of the rotating disk 311 restricts the position of the positioning rod 310. As the rotating disk 311 slides, the positioning rod 310 will drive the pusher 38 to move along the support disk in the second linkage groove 37. When the radial inward sliding of 33 pushes the 38 to move, the side wall of the control wheel 35 is squeezed by the extrusion assembly 39. The control wheel 35 meshes with the control wheel rack 361 on the outer side of the anti-overload rod 36. The control wheel is fixed, which can limit the downward movement of the anti-overload rod 36, thereby playing the role of preventing overload. The high precision and good wear resistance of the ball screw 24, coupled with the protection of the system by the anti-overload assembly 3, enable the mechanism to maintain high precision during long-term use, reducing the risk of precision decline due to wear and deformation.

[0035] like Figures 10-12 As shown, the extrusion assembly 39 includes an inclined extrusion bar 391. An extrusion head 392 in a ring array is installed at one end of the extrusion bar 391 opposite to the pusher 38. The support plate 33 has a slot 3921 between the first linkage groove 34 and the second linkage groove 37. The end of the extrusion head 392 opposite to the extrusion bar 391 slides through the slot 3921 and is tightly attached to the side wall of the control wheel 35. A reset spring bar 393 in a ring array is installed between the outer side of the extrusion bar 391 opposite to the pusher 38 and the side wall of the second linkage groove 37.

[0036] It should be noted that when the pusher 38 moves, the compression bar 391 moves accordingly. The compression head 392 at the end opposite to the pusher 38 will press against the side wall of the control wheel 35 and exert a compression effect. Because the compression bar 391 is inclined, this inclined structure allows the compression head 392 to compress the control wheel 35 at a certain angle and force. At the same time, the return spring rod 393 provides a restoring force between the outer side of the compression bar 391 opposite to the pusher 38 and the side wall of the second linkage groove 37. When the overload signal is released and the electric push rod no longer pushes the rotating disk 313, the elasticity of the return spring rod 393 can help the compression bar 391 and the compression head 392 return to the initial position, thereby releasing the compression on the control wheel 35 and allowing the anti-overload rod 36 to move normally.

[0037] like Figures 8-9As shown, a soundproof cover 362 is installed below the support member 15 and outside the anti-overweight rod 36. The connecting plate 217 is installed on the left side of the soundproof cover 362. The top of the soundproof cover 362 slides through the top of the mounting bracket 14. A rotating groove 363 is provided below the soundproof cover 362. The connecting arc plate 312 is slidably connected inside the rotating groove 363. The rotating groove 363 has telescopic grooves at the left and right ends of the connecting arc plate 312. A sound insulation plate 364 is connected inside the telescopic groove through a sliding rail. The sound insulation plate 364 is tightly attached to the side wall of the connecting arc plate 312. An expansion spring 365 is installed between the side wall of the telescopic groove and the sound insulation plate 364.

[0038] It should be noted that when the connecting arc plate 312 moves with the rotation of the rotating disk 313, it slides in the rotating groove 363. The sound insulation plate 364 in the telescopic groove on both sides of the rotating groove 363 is tightly attached to the side wall of the connecting arc plate 312 and is kept in contact with the connecting arc plate 312 by the expansion spring 365. When the connecting arc plate 312 moves, it will push the sound insulation plate 364 to slide along the slide rail in the telescopic groove. The expansion spring 365 will extend and retract according to the movement of the sound insulation plate 364 to adapt to the position change of the connecting arc plate 312 and maintain the sound insulation effect.

[0039] It is worth noting that when the support plate 12 is lifted, the support member 15 and the soundproof cover 362 connected to it also extend on the mounting bracket 14. During the reciprocating extension and retraction of the soundproof cover 362, it drives the connecting plate 217 to move up and down, thereby realizing the normal operation of the air outlet assembly.

[0040] The working principle of this invention is as follows: the navigation and guidance vehicle 1 is responsible for moving the entire device to the designated position. When lifting is required, the explosion-proof motor 22 starts, drives the drive wheel 21 to rotate via the reducer, and causes the synchronous pulley 23 to rotate synchronously via the synchronous belt 25. The nut 231 inside the synchronous pulley 23 rotates, causing the ball screw 24 to rise vertically, thereby lifting the bearing plate 12. The synchronous pulley 23 and the synchronous belt tension pulley 27 respectively maintain the tension and stable transmission of the synchronous belt 25. When the cleaning component 211 is working, the piston plate 214 moves to push gas into the gas outlet component. The gas exits from the first arc-shaped air outlet plate 2102 and the second arc-shaped air outlet plate 2104 and the air conveyor. Pipe 222 blows air to clean impurities from synchronous pulley 23 and synchronous belt 25. Dustproof net 223 prevents impurities from entering. When the cargo is overweight, gravity sensor 13 transmits a signal to an external terminal to control the electric push rod to start. The electric push rod pushes the rotating disk 313, which drives the rotating disk 311 to slide through the connecting arc plate 312. This causes the positioning rod 310 to drive the pusher 38 to slide in the second linkage groove 37. The extrusion angle bar 391 and extrusion head 392 of the extrusion assembly 39 extrude the control wheel 35, limiting the movement of the anti-overweight rod 36 and playing an anti-overweight role. When the overweight signal is released, the reset spring rod 393 helps the extrusion assembly 39 to reset.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof precision lifting device for AGVs based on synchronous pulleys, characterized in that, include: Navigation and guidance vehicle (1) is used to move this device; A support plate (12) is located on top of the navigation and guidance vehicle (1) and is used to support the workpiece; Gravity sensor (13), which is located on the top side of the navigation and guidance vehicle (1), is used to detect the weight of the workpiece in real time; Mounting bracket (14), which is located inside the navigation and guidance vehicle (1), has a concave shape and is used to support and fix the entire system; Support member (15), which is disposed above mounting bracket (14) for supporting bearing plate (12); A precision lifting assembly (2), which is mounted on a mounting bracket (14), is used for precise lifting and lowering of the support plate (12); Overweight prevention component (3), which is installed inside the navigation and guidance vehicle (1) to prevent the load-bearing plate (12) from being overweight; The anti-overweight component (3) includes a support base (31) installed on the navigation guide vehicle (1). Support rods (32) are installed at the front and rear ends of the support base (31). A support plate (33) is installed on the top of the support rods (32). The support plate (33) has a hollow structure. A first linkage groove (34) is opened along the circumference inside the support plate (33). A control wheel (35) is rotatably connected inside the first linkage groove (34) and arranged vertically. An anti-overweight rod (36) is installed below the support member (15). A control wheel rack (361) is installed along the circumference on the outer side of the anti-overweight rod (36). The control wheel rack (361) and the control wheel (35) mesh with each other. The anti-overweight rod (36) and the control wheel rack (361) slide through the middle of the support plate (33). A second linkage groove (361) is opened along the circumference on the inner side of the support plate (33) between the spaced control wheels (35). The second linkage groove (37) has a pusher (38) that slides radially along the support plate (33) inside the second linkage groove (37). The pusher (38) has a pressing component (39) on the side facing the control wheel (35). A positioning rod (310) is installed on the top of the pusher (38). A rotating plate (311) is slidably connected to the outside of the support plate (33). A limiting groove that can slide through the positioning rod (310) is opened on the top of the rotating plate (311). Two connecting arc plates (312) are installed below the rotating plate (311). A rotatable rotating plate (313) is installed below the connecting arc plates (312). The rotating plate (313) is rotatably connected inside the navigation and guidance vehicle (1). An electric push rod for driving the rotating plate (313) is installed in the middle of the navigation and guidance vehicle (1). The electric push rod and the gravity sensor (13) are electrically connected through an external terminal.

2. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 1, characterized in that; The precision lifting assembly (2) includes a drive wheel (21) rotatably connected to the left side of the mounting bracket (14). An explosion-proof motor (22) is installed inside the navigation and guidance vehicle (1). The output end of the explosion-proof motor (22) is connected to the drive wheel (21) via a reducer. A rectangular array of synchronous pulleys (23) is rotatably connected to the top surface of the mounting bracket (14). Each set of synchronous pulleys (23) has a nut (231) installed inside, and the internal threads of the nut (231) are connected to a vertically arranged ball screw (24). Each set of ball screws (24) is installed on... Below the support plate (12), a synchronous belt (25) is connected to the outer side of each set of synchronous pulleys (23). A symmetrically distributed guide wheel (26) is rotatably connected to the top left side of the mounting bracket (14). The guide wheel (26) is in close contact with the side of the synchronous belt (25) facing away from the drive wheel (21). A synchronous belt tensioning wheel (27) is provided at the top of the ball screw (24) between the front and rear ends, passing through one side of the synchronous belt (25). A cleaning assembly (211) for blowing away impurities from the synchronous pulleys (23) and the synchronous belt (25) is installed on the top of the mounting bracket (14).

3. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 2, characterized in that; The cleaning assembly (211) includes a fixing plate (212) bolted to the right side of the mounting bracket (14). Two fixing sleeves (213) are mounted on the bottom of the fixing plate (212). Piston plates (214) are slidably connected below the two fixing sleeves (213). The rear piston plate (214) extends below the fixing sleeve (213), while the front piston plate (214) extends into the fixing sleeve (213). Gear teeth (2141) are mounted on opposite sides of the two piston plates (214). The mounting bracket (14)... A mounting bracket (215) is installed on the lower right side of the mounting bracket (215). A linkage wheel (216) is installed below the mounting bracket (215). Two gear teeth (2141) are respectively located on the front and rear sides of the linkage wheel (216) and both mesh with the linkage wheel (216). A connecting plate (217) is installed below the piston plate (214) at the rear end. Two air inlet pipes (218) are installed on the top of the fixing plate (212) and communicate with the inside of the fixing sleeve (213). The end of the air inlet pipe (218) away from the fixing plate (212) extends into the air outlet assembly.

4. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 3, characterized in that; The air outlet assembly includes a connecting air plate (2101) installed on the top of the mounting bracket (14), a first arc-shaped air outlet plate (2102) installed at both ends of the air inlet pipe (218), a second air outlet connecting plate (2103) installed on the left side of the first arc-shaped air outlet plate (2102), and a second arc-shaped air outlet plate (2104) installed on the left side of the second air outlet connecting plate (2103). The air inlet pipe (218), the first arc-shaped air outlet plate (2102) and the second arc-shaped air outlet plate (2104) are interconnected.

5. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 4, characterized in that; Both the first arc-shaped air outlet plate (2102) and the second arc-shaped air outlet plate (2104) are equipped with branch pipes (221). Both the first arc-shaped air outlet plate (2102) and the second arc-shaped air outlet plate (2104) have linearly arrayed air supply pipes (222) on their inner sides. The air supply pipes (222) are inclined downwards. The air supply pipes (222) and the branch pipes (221) are connected. The side of the branch pipes (221) facing away from the air supply pipes (222) is connected to the air inlet pipe (218). The outlet end of the air supply pipes (222) is equipped with a dustproof net (223).

6. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 4, characterized in that; The mounting bracket (14) has a fixed seat (28) installed at the top of both ends. The fixed seat (28) has a threaded connection in the middle with an adjusting rod (29) that is distributed laterally. An L-shaped moving block (291) is installed on the opposite side of the two adjusting rods (29). The vertical end of the L-shaped moving block (291) is connected to the mounting bracket (14) by a slide rail. The synchronous belt tension wheel (27) is rotatably connected above the vertical end of the L-shaped moving block (291).

7. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 1, characterized in that; The extrusion assembly (39) includes an inclined extrusion bar (391). An extrusion head (392) in a ring array is installed at one end of the extrusion bar (391) facing away from the pusher (38). The support plate (33) has a slot (3921) between the first linkage slot (34) and the second linkage slot (37). The end of the extrusion head (392) facing away from the extrusion bar (391) slides through the slot (3921) and is tightly attached to the side wall of the control wheel (35). A reset spring rod (393) in a ring array is installed between the outer side of the extrusion bar (391) facing away from the pusher (38) and the side wall of the second linkage slot (37).

8. The explosion-proof precision lifting device for AGV based on synchronous pulleys according to claim 3, characterized in that; A soundproof cover (362) is installed below the support member (15) and outside the anti-overweight rod (36). The connecting plate (217) is installed on the left side of the soundproof cover (362). The top of the soundproof cover (362) slides through the top of the mounting bracket (14). A rotating groove (363) is provided below the soundproof cover (362). The connecting arc plate (312) is slidably connected inside the rotating groove (363). The rotating groove (363) has telescopic grooves at the left and right ends of the connecting arc plate (312). A sound insulation plate (364) is connected inside the telescopic groove through a sliding rail. The sound insulation plate (364) is tightly attached to the side wall of the connecting arc plate (312). An expansion spring (365) is installed between the side wall of the telescopic groove and the sound insulation plate (364).

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