Lifting transport device for sandboxes for foundry

Abstract

The application discloses a lifting type transportation equipment for casting sand boxes, and relates to the technical field of sand box transportation.The lifting type transportation equipment comprises a base, a platform arranged above the base, an adjusting mechanism arranged above the platform, a square groove, a conveying belt support, a sliding rod and two servo motors, the square groove is arranged on the upper surface of the platform, four electric push rods are fixedly connected to the inner wall of the square groove, the conveying belt support is fixedly connected to the telescopic end of each electric push rod, and the output rotating shaft of each servo motor is fixedly connected with a rotating rod.The lifting type transportation equipment can be mutually matched with the adjusting mechanism and the platform, the sealing cover and the four mounting frames can comprehensively protect the sand box when the sand box is transported, the problem of sand leakage caused by external factors when the sand box is transported is effectively solved, and the stability of the device during transportation is improved.

Description

Technical Field

[0001] This invention relates to the field of sand box transportation technology, specifically a lifting and transporting device for casting sand boxes. Background Technology

[0002] Sand casting refers to a casting method in which the castings to be produced must be made in a sand mold. Currently, most castings produced by sand casting are made of steel, iron, and most non-ferrous alloys. The casting method is simple and the materials are inexpensive and readily available, making sand casting an indispensable casting method in the existing casting process. However, after long-term use, the sand box needs to be cleaned and recycled, and the sand box needs to be transferred back and forth. At this time, a professional transportation device is needed to transport the sand box.

[0003] According to patent CN 114799053, a sand box lifting and conveying device is disclosed, including a scissor lifting mechanism and a conveying mechanism connected in cooperation with the scissor lifting mechanism. The scissor lifting mechanism includes a base frame, an upper frame, scissor supports, and a first driving device. Two sets of symmetrical scissor supports are arranged between the base frame and the upper frame. Each scissor support includes a first support rod and a second support hinged together in the middle. The beneficial effects of this invention are: the conveying rollers on the conveying mechanism realize the horizontal conveying of sand boxes under the drive of the conveying motor, thereby realizing the operation of sand boxes between processes at different heights. The equipment has a simple structure, convenient debugging method, and high sand box transportation efficiency. The sand box lifting and conveying device disclosed in this invention is intelligently controlled by a PLC controller, can communicate signals with multiple devices, and realize unmanned operation.

[0004] The sand box lifting and conveying equipment in the aforementioned patent transports sand boxes by placing them on conveyor rollers and then using a lifting mechanism to transfer sand boxes of different heights. However, in actual use, when transporting sand boxes, uneven ground is inevitably encountered during the transportation process, causing the sand boxes to shake and spill out, resulting in unnecessary waste. To address this issue, we provide a lifting and conveying equipment for casting sand boxes to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lifting and transporting device for casting sand boxes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lifting and transporting device for a casting sand box, comprising a base, a platform above the base, and an adjustment mechanism above the platform. The adjustment mechanism includes a square groove, a conveyor belt support, a sliding rod, and two servo motors. The square groove is formed on the upper surface of the platform. Four electric push rods are fixedly connected to the inner wall of the square groove. The telescopic end of each electric push rod is fixedly connected to the bottom surface of the conveyor belt support. A rotating rod is fixedly connected to the output shaft of each servo motor. Each rotating rod passes through the conveyor belt support and is rotatably connected to the conveyor belt support. Four mounting brackets are fixedly connected to the upper surface of the platform. A power motor is fixedly connected to the upper surface of the platform. A threaded rod is fixedly connected to the output shaft of the power motor. Three sliding rods are fixedly connected to the upper surface of the platform. A sealing cover is threadedly connected to the outer surface of the threaded rod. Each sliding rod passes through the sealing cover and is slidably connected to the sealing cover.

[0007] Furthermore, a drying layer of a certain thickness is provided on the sealing cover. The drying layer includes a water-absorbing layer laid flat on the lower surface of the sealing cover and a rubber ring layer arranged in a ring around the sealing cover. The water-absorbing layer is a sponge layer or a water-absorbing resin layer, and the rubber ring layer is elastic rubber. In order to improve the core strength and permeability of the casting sand, reduce the gas generated during the pouring process, and improve the quality of the castings, it is necessary to keep the casting sand dry during transportation. By providing a water-absorbing layer on the lower surface of the sealing cover, when the sealing cover is closed with the sand box, the water-absorbing layer can absorb the moisture contained in the casting sand in the sand box and dry the casting sand. At the same time, the elastic rubber ring layer around the sealing cover can further seal the connection between the sand box and the sealing cover, preventing moisture in the air from entering the sand box and preventing the casting sand from shaking and spilling out. The lower surface of the sealing cover, near the edge, is provided with multiple elastic airbags. These airbags are made of a thin film material, and each airbag has multiple air outlets for blowing air around it. The positions of the airbags correspond to the upper edge of the sand box. When the sealing cover and sand box are closed, the airbags are compressed by the sealing cover and sand box and blow air outwards through the air outlets. When the sealing cover is opened, the airbags, due to the elasticity of the material and pressure balance, can inflate through the air outlets and return to their expanded state. Because some foundry sand may spill during loading and transportation, some foundry sand may also spill along the upper edge of the sand box. If the sealing cover is closed at this time, the joint between the sealing cover and the sand box will be contaminated with residual sand particles. A completely seamless fit cannot guarantee sufficient sealing and is prone to wear on the sealing cap. By setting multiple elastic airbags on the lower surface of the sealing cap near the edge, when the sealing cap is closed with the sand box, the elastic airbags are compressed by the sealing cap and the sand box and blow air outwards through the air outlets. The blown air blows off the casting sand scattered along the upper edge of the sand box. Because the elastic airbags are made of thin film material, after the sealing cap is closed, the elastic airbags are flattened between the sealing cap and the upper edge of the sand box. Combined with the rubber ring layer, the sealing cap and the sand box fit tightly, improving the sealing performance and preventing the casting sand in the sand box from scattering outwards. It also avoids residual sand particles from causing wear on the sealing cap. When the sealing cap is opened, the elastic airbags will inflate through the air outlets and return to the inflated state, that is, the elastic airbags can be repeatedly inflated and deflated.

[0008] Furthermore, a lifting mechanism is provided between the base and the platform, the lifting mechanism including a second slide rod, a support rod, a lead screw, two first slide grooves and two lifting frames.

[0009] Furthermore, both of the aforementioned sliding grooves are formed on the inner wall of the base, and the two ends of the sliding rod are slidably connected to the inner walls of the two sliding grooves respectively.

[0010] Furthermore, both ends of the support rod are fixedly connected to the inner wall of the base, the two lifting frames are installed between the base and the platform, and the slide rod and the support rod are rotatably connected to the lifting frames.

[0011] Furthermore, the lead screw is disposed between two lifting frames, each of which is rotatably connected to the outer surface of the lead screw. A connecting rod is fixedly connected between the two lifting frames, and two symmetrical hinge blocks are fixedly connected to the outer surface of the connecting rod.

[0012] Furthermore, each of the hinge blocks has an electric telescopic rod hinged to its outer surface, and the telescopic section of each electric telescopic rod is fixedly connected to a lead screw.

[0013] Furthermore, the bottom surface of the platform is fixedly connected to two symmetrical hinge blocks, which are respectively hinged to the outer surfaces of the two lifting frames.

[0014] Furthermore, the bottom surface of the platform has two symmetrical sliding grooves, and the inner wall of each sliding groove is fixedly connected with a sliding rod, and the outer surface of each sliding rod is slidably connected with a hinge block, and the outer surfaces of the two hinge blocks are respectively hinged to the outer surfaces of the two lifting frames.

[0015] Furthermore, an air pump is installed on the platform, and the elastic airbags are also equipped with air inlets. The air pump is connected to the air inlets of multiple elastic airbags through air pipes and can inflate the elastic airbags through the air pipes. A conveyor belt is installed on the conveyor belt support, and the conveyor belt is wound around the rollers inside the conveyor belt support. A weight sensor is installed on the surface of the conveyor belt, and the weight sensor is used to measure the weight of the sand box. The weight sensor is electrically connected to the air pump through a controller. Since the total weight of the sand box and the foundry sand inside does not vary each time the lifting and transporting equipment transports it, generally, the more foundry sand in the sand box, the greater the weight of the sand box during transportation. The more sand particles scattered in the sand box, the more sand particles remain on the edge of the sand box, making it more difficult to clean. When the sand box is placed on the surface of the conveyor belt above the conveyor belt support by a forklift or other means, the weight sensor on the surface of the conveyor belt detects the weight of the sand box and sends the weight value to the controller. The controller automatically controls the amount of air pumped into multiple elastic air bladders according to the weight of the sand box. That is, the heavier the sand box, the greater the amount of air pumped into the elastic air bladders, and the greater the expansion of the air bladders. The squeezing effect generated by the sealing cover closing the sand box causes the elastic air bladders to blow more air out in all directions, which is more conducive to blowing off the scattered and residual foundry sand on the edge of the sand box.

[0016] Furthermore, the conveyor belt support is made of an elastic sponge-like material with a fluffy interior that can hold a certain amount of air. Multiple air pores are provided on the outer surface of the conveyor belt support outside the conveyor belt coverage area. Since casting sand scattered on the surface of the conveyor belt support and the conveyor belt itself can cause wear on the bottom of the sand box and the outer surfaces of the conveyor belt and support, when the sand box is placed on the conveyor belt surface above the support using a forklift or other means, the elastic sponge-like structure of the support causes the sand box to deform under gravity. The air inside the support is then expelled through the air pores on its outer surface, blowing off the scattered casting sand from the edges of the conveyor belt and the surface of the support, thus preventing the casting sand from causing wear on the sand box, the support, and the conveyor belt.

[0017] Furthermore, the elastic airbags are made of lightweight rubber material. Ideally, after each sealing cover and sand box closure, the air inside the elastic airbags is completely squeezed out, meaning the elastic airbags are essentially flattened. To ensure sufficient air inside the elastic airbags when the sealing cover closes next time, a weight sensor detects the sand box mass and automatically controls the air pump to inflate all elastic airbags. The weight sensor is electrically connected to the air pump and simultaneously connected to a controller. The controller has a preset relationship between the total weight of the sand box and the air pump inflation rate. It is set that when the casting sand fills the sand box, the air pump inflates multiple elastic airbags from a flattened state to a fully expanded state. When the corresponding weight sensor detects the actual weight of the sand box, it can control the actual inflation rate of the air pump according to the preset relationship. When the weight sensor detects the actual weight of the sand box, it controls the total inflation rate of the elastic airbags by the air pump to be... Where M is the actual mass of the casting sand in the sand box, M b M0 is the mass of the casting sand when the sand box is full, R is the radius of the elastic air bladder, and N is the number of elastic air bladders. According to the above relationship, the weight sensor can automatically control the air pump to inflate all the elastic air bladders appropriately according to the different weight of the casting sand detected in each working condition. This can not only ensure that the casting sand scattered on the edge of the sand box is blown off, but also save a certain amount of power.

[0018] In another embodiment, the elastic airbag is further provided with an air inlet. The mounting frame has an angular structure and includes two side plates and a base plate. A second elastic airbag is provided on the upper surface of the base plate of each of the four mounting frames. The second elastic airbag is connected to the air inlets of the multiple elastic airbags via a second air pipe and can be inflated into the multiple elastic airbags through the second air pipe. When the sand box is placed above the conveyor belt support by a forklift or other means, the servo motor is started to drive the rotating rod to rotate. The rotating rod drives the roller inside the conveyor belt support to rotate, and the rotation of the roller drives the conveyor belt support to rotate, so that the sand box is accurately positioned in the center of the four mounting frames. The electric push rod drives the conveyor belt support to move down, fixing the sand box between the four mounting brackets. At this time, the lower surface of the sand box contacts the base plate of the four mounting brackets, and the weight of the sand box compresses the four second elastic air bladders. The air in the second elastic air bladders enters multiple elastic air bladders through the second air pipe and inflates the elastic air bladders. Then, when the sealing cover closes with the sand box, the elastic air bladders are compressed by the sealing cover and the sand box and blow air out through the air outlet. The blown air blows off the foundry sand scattered on the upper edge of the sand box. When the sealing cover is opened again and the sand box is removed from the mounting brackets, the elastic air bladders and the second elastic air bladders will automatically inflate and return to a certain expansion state due to the elasticity of the material and the balance of air pressure.

[0019] Compared with existing technologies, this sand box lifting and transport equipment has the following advantages:

[0020] 1. This invention, through the coordination between the adjustment mechanism and the platform, provides comprehensive protection for the sand box during transportation via a sealing cover and four mounting brackets, effectively solving the problem of sand leakage caused by external factors during transportation and increasing the stability of the device during transport.

[0021] 2. By setting up a lifting mechanism and cooperating with the base and platform, the lifting mechanism can stably raise and lower the platform, increasing the stability of the sand box during the lifting process and improving the practicality of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a partial structural schematic diagram of the adjustment mechanism of the present invention;

[0024] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 This is a schematic diagram of the adjustment mechanism of the present invention;

[0026] Figure 5This is a schematic diagram of the lifting mechanism of the present invention;

[0027] Figure 6 This is a partial structural schematic diagram of the lifting mechanism of the present invention;

[0028] Figure 7 This is a top view of the sealing cap of the present invention.

[0029] In the diagram: 1. Base; 2. Platform; 3. Adjustment mechanism; 301. Square groove; 302. Electric push rod; 303. Conveyor belt support; 304. Servo motor; 305. Rotating rod; 306. Mounting bracket; 307. Power motor; 308. Threaded rod; 309. Slide rod one; 310. Sealing cover; 4. Lifting mechanism; 401. Slide groove one; 402. Slide rod two; 403. Support rod; 404. Lifting frame; 405. Connecting rod; 406. Hinge block one; 407. Electric telescopic rod; 408. Lead screw; 409. Hinge block two; 410. Slide groove two; 411. Slide rod three; 412. Hinge block three. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4 A lifting and transporting device for a casting sand box includes a base 1, a platform 2 above the base 1, and an adjusting mechanism 3 above the platform 2. The adjusting mechanism 3 includes a square groove 301, a conveyor belt support 303, a slide bar 309, and two servo motors 304. The square groove 301 is formed on the upper surface of the platform 2. Four electric push rods 302 are fixedly connected to the inner wall of the square groove 301. The telescopic end of each electric push rod 302 is fixedly connected to the bottom surface of the conveyor belt support 303. When the sand box needs to be transported, the four electric push rods 302 are activated to drive the conveyor belt support 303 to rise above the mounting frame 306, and then the sand box is placed on the conveyor belt support 303.

[0032] Each servo motor 304 has its output shaft fixedly connected to a rotating rod 305. Each rotating rod 305 passes through the conveyor belt bracket 303 and is rotatably connected to the conveyor belt bracket 303. Four mounting brackets 306 are fixedly connected to the upper surface of the platform 2. The servo motor 304 can be used as a power input source. In this application, its model is not specifically limited, and it can also be replaced by other power drive structures. Starting the servo motor 304 drives the rotating rod 305 to rotate. The rotation of the rotating rod 305 drives the roller inside the conveyor belt bracket 303 to rotate. The rotation of the roller drives the conveyor belt bracket 303 to rotate, thereby achieving the correction. When the sand box is placed, it can be accurately fixed to the four mounting brackets 306.

[0033] A power motor 307 is fixedly connected to the upper surface of the platform 2. A threaded rod 308 is fixedly connected to the output shaft of the power motor 307. Three sliding rods 309 are fixedly connected to the upper surface of the platform 2. The sealing cover 310 is threadedly connected to the outer surface of the threaded rod 308. Each sliding rod 309 passes through the sealing cover 310 and is slidably connected to the sealing cover 310. When the power motor 307 starts, it drives the threaded rod 308 to rotate. The rotation of the threaded rod 308 drives the sealing cover 310 to move and slide on the outer surface of the three sliding rods 309. When the sand box is placed on the four mounting brackets 306, the sealing cover 310 can completely close the top of the sand box, increasing the stability of the device during transportation.

[0034] In another embodiment, a drying layer of a certain thickness is provided on the sealing cover. The drying layer includes a water-absorbing layer 311 laid flat on the lower surface of the sealing cover and a rubber ring layer 312 arranged in a ring around the sealing cover. The water-absorbing layer 311 is a sponge layer or a water-absorbing resin layer, and the rubber ring layer 312 is elastic rubber. A plurality of elastic airbags 313 are provided on the lower surface of the sealing cover 310 near the edge. The elastic airbags 313 are made of thin film material. Each elastic airbag 313 has multiple air ports for blowing air around it. The position of the elastic airbags 313 corresponds to the upper edge of the sand box 5. When the sealing cover 310 and the sand box 5 are closed, the elastic airbags 313 are squeezed by the sealing cover 310 and the sand box 5 and blow air around them through the air ports. When the sealing cover 310 is opened, the elastic airbags 313 can be inflated through the air ports and return to the inflated state.

[0035] See Figure 5 and Figure 6A lifting mechanism 4 is provided between the base 1 and the platform 2. The lifting mechanism 4 includes a second slide rod 402, a support rod 403, a lead screw 408, two first slide grooves 401, and two lifting frames 404. The two first slide grooves 401 are both opened on the inner wall of the base 1. The two ends of the second slide rod 402 are slidably connected to the inner wall of the two first slide grooves 401 respectively. When the second slide rod 402 moves, the two first slide grooves 401 can make the movement of the second slide rod 402 more stable. The two ends of the support rod 403 are fixedly connected to the inner wall of the base 1. The fixed connection of the support rod 403 to the inner wall of the base 1 can make the hinge of the lifting frame 404 more stable, making the device more stable when lifting.

[0036] Two lifting frames 404 are installed between the base 1 and the platform 2. The slide rod 402 and the support rod 403 are rotatably connected to the lifting frame 404. The rotatable connection can ensure that the movement of the lifting frame 404 is more stable. The lead screw 408 is arranged between the two lifting frames 404. Each lifting frame 404 is rotatably connected to the outer surface of the lead screw 408. When the lifting frame 404 moves, it rotates on the outer surface of the lead screw 408, which increases stability.

[0037] A connecting rod 405 is fixedly connected between the two lifting frames 404. Two symmetrical hinge blocks 406 are fixedly connected to the outer surface of the connecting rod 405. An electric telescopic rod 407 is hinged to the outer surface of the hinge block 406. The telescopic section of each electric telescopic rod 407 is fixedly connected to a lead screw 408. When the device needs to be raised or lowered, the electric telescopic rod 407 is activated. The electric telescopic rod 407 drives the lead screw 408 to move. The lead screw 408 drives the two lifting frames 404 to move. The movement of the lifting frames 404 causes the slide rod 402 to slide on the inner wall of the two slide grooves 401.

[0038] The bottom surface of the platform 2 is fixedly connected to two symmetrical hinge blocks 409. The two hinge blocks 409 are respectively hinged to the outer surfaces of two lifting frames 404. The bottom surface of the platform 2 is provided with two symmetrical sliding grooves 410. The inner wall of each sliding groove 410 is fixedly connected to a sliding rod 411. The outer surface of each sliding rod 411 is slidably connected to a hinge block 412. The outer surfaces of the two hinge blocks 412 are respectively hinged to the outer surfaces of the two lifting frames 404. When the lifting frames 404 move, the two hinge blocks 412 hinged to them slide on the outer surfaces of the sliding rods 411. When the two lifting frames 404 move, the platform 2 is raised and lowered through the two hinge blocks 409 and the two hinge blocks 412 hinged to them, which increases the stability of the device during raising and lowering.

[0039] In another embodiment, an air pump is provided on the platform, and the elastic airbag 313 is also provided with an air inlet. The air pump is connected to the air inlets of multiple elastic airbags 313 through air pipes and can inflate the elastic airbags 313 through the air pipes. A conveyor belt is provided on the conveyor belt support 303, and the conveyor belt is wound around a roller inside the conveyor belt support 303. A weight sensor is provided on the surface of the conveyor belt, and the weight sensor is used to measure the weight of the sand box 5. The weight sensor is electrically connected to the air pump through a controller. Since the total weight of the sand box 5 and the foundry sand inside it is not the same each time the lifting and transporting equipment transports it, generally, the more foundry sand in the sand box 5, the more likely the sand box 5 will be to be transported. The more sand particles are scattered during the process, the more sand particles remain on the edge of the sand box 5, making it more difficult to clean. When the sand box 5 is placed on the surface of the conveyor belt above the conveyor belt support 303 by a forklift or other means, the weight sensor on the surface of the conveyor belt detects the weight of the sand box 5 and sends the weight value to the controller. The controller automatically controls the amount of air pumped into the multiple elastic air bladders 313 according to the weight of the sand box 5. That is, the heavier the sand box 5, the greater the amount of air pumped into the elastic air bladders 313, and the greater the expansion of the air bladders. The squeezing effect generated by the sealing cover 310 closing with the sand box makes the elastic air bladders 313 blow more air out to all sides, which is more conducive to blowing off the scattered and residual casting sand on the edge of the sand box 5.

[0040] Furthermore, the conveyor belt support 303 is made of an elastic sponge-like material, with a fluffy interior that can hold a certain amount of air. Multiple air holes are provided on the outer surface of the conveyor belt support 303 outside the conveyor belt coverage area. Since casting sand scattered on the surface of the conveyor belt support 303 and the conveyor belt will cause wear on the bottom of the sand box 5 and the outer surface of the conveyor belt and the conveyor belt support 303, when the sand box 5 is placed on the conveyor belt surface above the conveyor belt support 303 by a forklift or other means, the sand box 5 will be compressed and deformed by gravity due to the elastic sponge-like nature of the conveyor belt support 303. The air inside the conveyor belt support 303 will be discharged through the air holes on the outer surface of the conveyor belt support, thereby blowing off the casting sand scattered on the edges of the conveyor belt and the surface of the conveyor belt support 303, preventing the casting sand from causing wear on the sand box 5, the conveyor belt support 303, and the conveyor belt.

[0041] Furthermore, the elastic airbags are made of lightweight rubber material. Ideally, after each sealing cover and sand box closure, the air inside the elastic airbags is completely squeezed out, meaning the elastic airbags are essentially flattened. To ensure sufficient air inside the elastic airbags when the sealing cover closes next time, a weight sensor detects the sand box mass and automatically controls the air pump to inflate all elastic airbags. The weight sensor is electrically connected to the air pump and simultaneously connected to a controller. The controller has a preset relationship between the total weight of the sand box and the air pump inflation rate. It is set that when the casting sand fills the sand box, the air pump inflates multiple elastic airbags from a flattened state to a fully expanded state. When the corresponding weight sensor detects the actual weight of the sand box, it can control the actual inflation rate of the air pump according to the preset relationship. When the weight sensor detects the actual weight of the sand box, it controls the total inflation rate of the elastic airbags by the air pump to be... Where M is the actual mass of the casting sand in the sand box, M b M0 is the mass of the casting sand when the sand box is full, R is the radius of the elastic air bladder, and N is the number of elastic air bladders. According to the above relationship, the weight sensor can automatically control the air pump to inflate all the elastic air bladders appropriately according to the different weight of the casting sand detected in each working condition. This can not only ensure that the casting sand scattered on the edge of the sand box is blown off, but also save a certain amount of power.

[0042] In another embodiment, the elastic airbag 313 is further provided with an air inlet. The mounting frame has an angular structure and includes two side plates and a bottom plate. A second elastic airbag is provided on the upper surface of the bottom plate of each of the four mounting frames. The second elastic airbag is connected to the air inlets of the multiple elastic airbags 313 via a second air pipe and can be inflated into the multiple elastic airbags 313 through the second air pipe. When the sand box is placed above the conveyor belt support 303 by a forklift or other means, the servo motor is started to drive the rotating rod to rotate. The rotating rod drives the roller inside the conveyor belt support 303 to rotate, and the rotation of the roller drives the conveyor belt support 303 to rotate, so that the sand box is accurately positioned in the middle of the four mounting frames. The electric motor is then activated. The push rod drives the conveyor belt bracket 303 to move down, fixing the sand box between the four mounting brackets. At this time, the lower surface of the sand box contacts the base plate of the four mounting brackets, and the weight of the sand box compresses the four second elastic air bladders. The air in the second elastic air bladders enters the multiple elastic air bladders 313 through the second air pipe and inflates the elastic air bladders 313. Then, when the sealing cover 310 closes with the sand box, the elastic air bladders 313 are compressed by the sealing cover 310 and the sand box and blow air outward through the air outlet. The blown air blows off the casting sand scattered on the upper edge of the sand box. When the sealing cover 310 is opened again and the sand box is removed from the mounting bracket, the elastic air bladders 313 and the second elastic air bladders will automatically inflate and return to a certain expansion state due to the elasticity of the material and the balance of air pressure.

[0043] Working Principle: When the sand box needs to be lifted and transported, first move the device to the ideal position. Then, start the power motor 307 in reverse to drive the threaded rod 308 to rotate. The threaded rod 308 drives the sealing cover 310 to the highest position. Stop the power motor 307 and start the electric push rod 302 to drive the conveyor belt support 303 to rise above the four mounting brackets 306. Place the sand box on the conveyor belt support 303 using a forklift or other means. After the sand box is placed, start the servo motor 304 to drive the rotating rod 305 to rotate. The rotating rod 305 drives the roller inside the conveyor belt support 303 to rotate. The rotation of the roller drives the conveyor belt support 303 to rotate, so that the sand box is accurately positioned in the middle of the four mounting brackets 306. At this time, start the electric push rod 302 to drive the conveyor belt support 303 to move down, so that the sand box is fixed between the four mounting brackets 306. Start the power motor 307 in the forward direction. The power motor 307 drives the threaded rod 308 to move down, and the threaded rod 308 drives the sealing cover 310 to the highest position. 8. Move the sealing cover 310 downwards, and let the sealing cover 310 slide downwards through the three slide rods 309, so that the sealing cover 310 is firmly closed with the sand box. Conversely, first raise the sealing cover 310, and then take it out through the gap between the sealing cover 310 and the platform 2. If it is necessary to raise or lower the device, start the electric telescopic rod 407. The electric telescopic rod 407 drives the screw 408 to rise or fall. The rise or fall of the screw 408 drives the two lifting frames 404 to expand or contract. The two lifting frames 404 drive the slide rod 402 to slide on the inner wall of the two slide grooves 401. The two lifting frames 404 drive the two hinge blocks 412 to slide on the outer surface of the two slide rods 411, realizing the raising and lowering of the device. This effectively solves the problem of sand leakage caused by external factors when the sand box is transported, increases the stability of the device during transportation, and the lifting mechanism 4 can make the platform 2 rise and fall stably, increasing the stability of the sand box during the lifting process.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting and transporting device for a casting sand box, comprising a base (1), characterized in that: A platform (2) is provided above the base (1), and an adjustment mechanism (3) is provided above the platform (2). The adjustment mechanism (3) includes a square groove (301), a conveyor belt support (303), a slide bar (309), a sealing cover (310), and two servo motors (304). The square groove (301) is opened on the upper surface of the platform (2). Four electric push rods (302) are fixedly connected to the inner wall of the square groove (301). The telescopic end of each electric push rod (302) is fixedly connected to the bottom surface of the conveyor belt support (303). The output shafts of the servo motors (304) are all fixedly connected to rotating rods (305). Each rotating rod (305) passes through the conveyor belt bracket (303) and is rotatably connected to the conveyor belt bracket (303). Four mounting brackets (306) are fixedly connected to the upper surface of the platform (2). A power motor (307) is fixedly connected to the upper surface of the platform (2). A threaded rod (308) is fixedly connected to the output shaft of the power motor (307). Three sliding rods (309) are fixedly connected to the upper surface of the platform (2). The sealing cover (310) is connected to the threaded rod. The outer surface of the rod (308) is threaded, and each of the slide rods (309) penetrates the sealing cover (310) and is slidably connected to the sealing cover (310); a drying layer of a certain thickness is provided on the sealing cover, the drying layer including a water-absorbing layer (311) laid flat on the lower surface of the sealing cover and a rubber ring layer (312) arranged in a ring around the sealing cover, the water-absorbing layer (311) being a sponge layer or a water-absorbing resin layer, and the rubber ring layer (312) being elastic rubber; multiple elastic airbags are provided in the area near the edge of the lower surface of the sealing cover (310). 313), the elastic airbag (313) is made of thin film material. Each elastic airbag (313) has multiple air ports for blowing air around the elastic airbag (313). The position of the elastic airbag (313) corresponds to the upper edge of the sand box (5). When the sealing cover (310) and the sand box (5) are closed, the elastic airbag (313) is squeezed by the sealing cover (310) and the sand box (5) and blows air around through the air ports. When the sealing cover (310) is opened, the elastic airbag (313) can be inflated through the air ports and return to the inflated state.

2. The lifting and transporting equipment for a casting sand box according to claim 1, characterized in that: A lifting mechanism (4) is provided between the base (1) and the platform (2). The lifting mechanism (4) includes a slide bar (402), a support rod (403), a lead screw (408), two slide grooves (401), and two lifting frames (404).

3. The lifting and transporting equipment for a casting sand box according to claim 2, characterized in that: Both of the first slide grooves (401) are formed on the inner wall of the base (1), and the two ends of the second slide rod (402) are slidably connected to the inner walls of the two slide grooves (401) respectively.

4. The lifting and transporting equipment for a casting sand box according to claim 2, characterized in that: Both ends of the support rod (403) are fixedly connected to the inner wall of the base (1), and the two lifting frames (404) are installed between the base (1) and the platform (2). The slide rod (402) and the support rod (403) are rotatably connected to the lifting frames (404).

5. The lifting and transporting equipment for a casting sand box according to claim 2, characterized in that: The lead screw (408) is disposed between two lifting frames (404), each of the lifting frames (404) is rotatably connected to the outer surface of the lead screw (408), and a connecting rod (405) is fixedly connected between the two lifting frames (404), and two symmetrical hinge blocks (406) are fixedly connected to the outer surface of the connecting rod (405).

6. The lifting and transporting equipment for a casting sand box according to claim 5, characterized in that: Each of the hinge blocks (406) has an electric telescopic rod (407) hinged to its outer surface, and the telescopic section of each electric telescopic rod (407) is fixedly connected to the lead screw (408).

7. The lifting and transporting equipment for a casting sand box according to claim 2, characterized in that: The bottom surface of the platform (2) is fixedly connected to two symmetrical hinge blocks (409), and the two hinge blocks (409) are respectively hinged to the outer surfaces of the two lifting frames (404).

8. The lifting and transporting equipment for a casting sand box according to claim 1, characterized in that: The bottom surface of the platform (2) has two symmetrical sliding grooves (410). Each sliding groove (410) has a sliding rod (411) fixedly connected to its inner wall. Each sliding rod (411) has a hinge block (412) slidably connected to its outer surface. The outer surfaces of the two hinge blocks (412) are respectively hinged to the outer surfaces of the two lifting frames (404).

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