A magnetic attraction device

Abstract

This utility model discloses a magnetic suction device, belonging to the field of airport metal debris removal technology. The device includes a mounting cover, a rear bracket, and a magnet. Connecting frames are located on both sides of the mounting cover, and the rear bracket is hinged to the connecting frames. The magnet is fixed to the lower surface of the mounting cover, and a flap is located below it. The magnetic attraction penetrates the flap to attract metal debris from the road surface onto its surface. The flap is rotatably connected to one side of the mounting cover and secured with a latch. After unlocking, it can flip over to unload debris, allowing the metal debris to fall off under gravity. A rubber baffle is located on the left side of the flap for scraping and guiding. Guide wheel mounting plates and support wheels are located on both sides of the connecting bracket to limit the gap between the device and the ground. This device has a reasonable structure, featuring a synergistic design of permanent magnet adsorption and flap unloading, enabling rapid and efficient collection and centralized unloading. It is adaptable to various operating vehicles and has the advantages of simple operation, high reliability, and low maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of airport metal foreign object removal technology, specifically a magnetic suction device. Background Technology

[0002] Foreign object debris (FOD) such as screws, bolts, release pins, and metal fragments on airport runways, taxiways, and aprons can cause damage to aircraft tires, engine ingestion of foreign objects, or malfunction of ground equipment, endangering flight and ground operation safety. Therefore, airports typically equip themselves with vehicle-mounted magnetic suction devices or specialized cleaning vehicles to regularly remove foreign object debris.

[0003] Among existing products, a typical solution is the PMB2400 permanent magnet magnetic attraction device, which has an operating width of about 2,400 mm and a typical ground clearance of about 100 mm. Under these conditions, the magnetic induction intensity is on the order of about 300G. The device can be mounted on the front of a medium or large sweeper and uses permanent magnets to attract common metal debris from runways, taxiways, and aprons. However, the magnetic material is dropped by swinging a stainless steel rod downwards away from the magnet.

[0004] However, existing magnetic suction devices still have the following shortcomings: Patent document CN219137540U proposes to design the magnetic suction arm as a main arm + left and right folding arms, and to achieve left and right expansion / retraction through cylinder drive. This solution emphasizes the lateral expansion coverage width and the stability of the boom lifting, but its focus is on the folding arm and lifting sleeve mechanism, and it does not provide a dedicated "flipping / demagnetizing" mechanism path for efficient chip removal after permanent magnet adsorption.

[0005] Patent document number CN219430628U employs a combination of an electromagnet, a magnetic plate, and a collection cylinder: when chip removal is required, the collection cylinder is rotated directly below the magnetic plate and the power is cut off, using vehicle vibration to cause metal parts on the magnetic plate to fall into the collection cylinder. The chip removal mechanism of this solution relies on the electromagnetic de-energization and the collection cylinder's support.

[0006] In summary, most existing technologies rely on manual labor or scraping devices to remove metal debris, resulting in a cumbersome unloading process and a high residue rate. They also suffer from poor vehicle compatibility, with low efficiency in switching between different vehicle models and mounting plate specifications, hindering rapid deployment across various operating vehicles. Furthermore, metal debris may scatter during unloading, posing a risk of secondary pollution if effective guidance and collection measures are lacking. Therefore, there is an urgent need for improved technologies to address these issues. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the existing defects and provide a magnetic suction device that uses permanent magnet adsorption and a flip plate for controllable unloading. During operation, the flip plate fits and carries the debris. When unloading, it is unlocked and flipped to weaken the magnetic circuit coupling, and the debris falls off in batches without the need for manual scraping or electromagnetic switching, thereby improving efficiency and reducing residue and downtime. The rubber baffle and folded edge guide reduce scattering, which can effectively solve the problems in the background technology.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a magnetic suction device, comprising a mounting cover, a rear bracket, and a magnet. Connecting frames are respectively provided on the left and right sides of the upper surface of the mounting cover. The rear bracket is hinged to the connecting frames. The magnet is disposed on the lower surface of the mounting cover, and a flip plate is provided on the lower surface of the magnet. The magnetic force of the magnet passes through the flip plate and attracts metal debris from the airport runway onto the surface of the flip plate. The flip plate is rotatably connected to one side of the mounting cover. The flip-up structure is designed so that during the flip-up process, the magnetic force weakens and can no longer attract the metal debris. The metal debris falls off under the action of gravity, completing the function. This device can collect metal debris in a unified manner and is easy to operate. A rubber baffle is set on the left side of the flap, and the magnetic attraction device is suspended from the front or rear of the vehicle via the rear bracket. When working, the rubber baffle acts as a scraper, which can catch metal debris and make it easier to attract and hold it. The upper surface of the cover plate is equipped with a locking plate with a locking buckle. When working, the flap is firmly fixed by the locking buckle, so that it is in contact with the surface of the magnet. When the locking buckle is released, the flap flips down to collect and unload the attracted magnetic debris. The buckle fastener is fixed to the flap, and this locking buckle is a conventional technology.

[0009] Furthermore, guide wheel mounting plates are provided on both sides of the connecting frame, and support wheels are provided on the guide wheel mounting plates. These support wheels play a role in supporting and guiding the magnetic suction device as a whole, and at the same time, they can keep the flip plate at a fixed distance from the ground, for example, within 50-150mm, which is enough to attract metal debris on the road surface. The specific distance is set according to the actual situation.

[0010] Furthermore, the top cover is surrounded by sealing plates, and the right side of the flap has an upwardly bent structure that guides debris and protects the magnet. The edge of the flap also has an upward bend to cover the magnet and reduce magnetic field leakage.

[0011] Furthermore, the rear mount is hinged with hinge arms, the other end of which connects to the connecting frame. There are four hinge arms, with two hinge arms on each side of the rear mount.

[0012] Furthermore, it also includes hydraulic cylinders, with cylinder mounting sleeves on the cylinders and connecting beams between the connecting frames. The telescopic ends of the hydraulic cylinders are rotatably connected to the connecting beams, and the connecting beams connect the connecting frames into a reliable whole. A fixed bracket is provided on the rear hanger, and the cylinder mounting sleeve is rotatably connected to the fixed bracket. A power unit is provided on the connecting frame. The power unit is existing technology and provides power to the hydraulic cylinders. The power unit is used as an oil supply device. It is connected to several hydraulic cylinders through an external pipeline system to control the action of multiple sets of valves. The extension and retraction of the hydraulic cylinders can drive the magnetic suction device to rise and fall.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves rapid and centralized unloading of metal debris through the synergistic design of permanent magnet adsorption and controllable chip removal by a flip plate: During operation, the flip plate adheres to the magnet to carry the debris, and during unloading, it is unlocked and flipped, weakening the magnetic circuit coupling. The debris falls off in batches under the action of gravity, avoiding manual scraping and frequent machine stops, and significantly improving the efficiency of continuous operation; at the same time, there is no need to maintain the suction force by electromagnetic switching, resulting in low energy consumption and thermal management requirements, better maintenance costs, and higher reliability.

[0014] 2. The gap control system of fixed height support wheel and hydraulic lifting is adopted to ensure that the target ground clearance is maintained under different road surfaces and vehicle postures, improve the adsorption hit rate and avoid dragging and wear; combined with the magnetic flux orientation and side / upward leakage suppression structure formed by the sealing plate and folding edge, the downward magnetic flux is concentrated.

[0015] 3. The device supports standardized mounting interfaces for quick mounting and dismounting, facilitating rapid deployment and relocation across vehicle models; rubber baffles and bent guide edges increase the probability of small parts being guided into the effective magnetic zone and reduce scattering, ensuring that chip removal is completed in a designated area while also taking into account cleaning and operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from below; Figure 3 This is a front view structural diagram of the present invention; Figure 4 This is an enlarged structural diagram of point A in this utility model; Figure 5 This is a side view of the structure of this utility model.

[0017] In the diagram: 1. Rubber baffle, 2. Sealing plate, 3. Magnet, 4. Flip plate, 5. Support wheel, 6. Mounting cover plate, 7. Locking plate, 8. Lock, 9. Connecting beam, 10. Connecting frame, 11. Power unit, 12. Hydraulic cylinder, 13. Rear hanger, 14. Guide wheel mounting plate, 15. Oil cylinder fixing sleeve, 16. Fixing bracket, 17. Hinge arm, 18. Bending structure. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Please see Figure 1-5 .

[0020] In one possible implementation, connecting frames 10 are respectively provided on the left and right sides of the upper surface of the mounting cover plate 6. The rear bracket 13 is hinged to the connecting frames 10. The magnet 3 is provided on the lower surface of the mounting cover plate 6, and a flip plate 4 is provided on the lower surface of the magnet 3. The magnetic force of the magnet 3 acts on the metal debris on the ground through the flip plate 4, causing it to be attracted to the surface of the flip plate 4. The flip plate 4 is rotatably connected to one side of the mounting cover plate 6 by a pivot, thereby forming a flip-up structure. The rotatable connection between the mounting cover plate 6 and the flip plate 4 can be achieved by a hinge, a pin + bushing, or a sliding shaft structure, or a flexible hinge material can be used. For heavy-duty working conditions, a pin + bushing structure is preferred. The bushing connection ensures the durability and stability of the structure. When the flap 4 flips, the magnetic force weakens, and the metal debris falls off under the action of gravity, achieving centralized unloading. A rubber baffle 1 is set on the left side of the flap 4. The magnetic attraction device is suspended at the front or rear of the vehicle through the rear bracket 13. During operation, the rubber baffle 1 acts as a scraper to push the metal debris into the adsorption area. The upper surface of the cover plate 6 is provided with a locking plate 7, and a locking buckle 8 is provided on the locking plate 7 to fix the flap 4 during operation and make it fit with the magnet 3. When unloading, the locking buckle 8 is released, the flap 4 flips down, and the adsorbed metal debris is unloaded in a concentrated manner. The locking buckle 8 is a conventional structure.

[0021] In the above embodiments, the magnet 3 and the mounting cover plate 6 can be fixed by screw locking, pressure plate clamping, adhesive bonding or embedded slot fixing, or a combination of adhesive bonding and mechanical pressure plate to improve reliability and durability. Depending on the different usage environments, a single or combined fixing method can be selected to ensure that the magnet 3 works stably for a long time.

[0022] In another possible implementation, guide wheel mounting plates 14 are provided on both sides of the connecting frame 10. Support wheels 5 are installed on the guide wheel mounting plates 14. The support wheels 5 play the role of supporting and guiding the magnetic suction device as a whole, and ensuring that the flip plate 4 maintains a fixed gap with the ground, such as 50-150mm, so as to adapt to different working environments and ensure the adsorption effect.

[0023] In another possible implementation, a sealing plate 2 is provided around the top cover plate 6, and an upwardly bent structure 18 is provided on the right side of the flip plate 4 to guide debris and wrap and protect the magnet 3; the edge of the flip plate 4 is provided with an upwardly bent part so that the magnet 3 is in a covered state, thereby reducing magnetic field leakage and increasing magnetic field concentration.

[0024] In another possible implementation, a hinge arm 17 is hinged to the rear mount 13, and the other end of the hinge arm 17 is hinged to the connecting frame 10. There are four hinge arms 17 in total, which are arranged on both sides of the rear mount 13, two on each side. This structure ensures the stability of the connection between the magnetic device and the vehicle and has a certain buffering and shock absorption capacity.

[0025] In another possible implementation, a hydraulic cylinder 12 is also included, on which a cylinder fixing sleeve 15 is provided. A connecting beam 9 is provided between the connecting frames 10. The telescopic end of the hydraulic cylinder 12 is rotatably connected to the connecting beam 9 to realize the overall lifting and lowering of the connecting frames 10 on both sides. A fixed bracket 16 is provided on the rear hanger 13, and the cylinder fixing sleeve 15 is rotatably connected to the fixed bracket 16. A power unit 11 is provided on the connecting frame 10 as an oil supply device. It is connected to multiple hydraulic cylinders through an external pipeline system to control their telescopic movement, thereby realizing the lifting and lowering adjustment of the magnetic suction device.

[0026] Working principle: This magnetic attraction device uses magnet 3 to attract metallic foreign objects on airport runways or taxiways through flap 4. During operation, flap 4 is in contact with the surface of magnet 3 to ensure the effect of the magnetic field. When unloading, the latch 8 is released, flap 4 flips, the magnetic circuit coupling is weakened, and the metallic debris falls off under the action of gravity without the need for manual scraping. Support wheel 5 is used to limit the ground clearance to ensure magnetic attraction efficiency and equipment life. Sealing plate 2 and bending structure 18 play a guiding and protective role to reduce debris scattering and magnetic field leakage. Articulated arm 17 ensures the stability of connection with vehicles. Hydraulic cylinder 12 and power unit 11 realize lifting and adjustment to adapt to different working conditions.

[0027] This magnetic attraction device has a reasonable structure and the following advantages: The device combines permanent magnet adsorption with tipping unloading, resulting in high operating efficiency, rapid and concentrated chip removal, and reduced manual intervention and residue. It employs a gap control system combining support wheel height control and hydraulic lifting to adapt to different road conditions and prevent wear. Sealing plates, bending structures, and rubber baffles work together to improve debris guidance and reduce secondary scattering. The articulated arm is rationally arranged, enhancing stability and durability. The hydraulic drive system provides flexible lifting capabilities, improving adaptability and ease of operation.

[0028] Alternative or modified implementation methods Magnet 3 can be made of neodymium iron boron or ferrite material to meet different magnetic force requirements; flap 4 can be made of different materials such as stainless steel or wear-resistant composite plate; rubber baffle 1 can be replaced with polyurethane material; support wheel 5 can be made of rubber wheel, polyurethane wheel or metal-coated wheel, and the number and position can be adjusted as needed; bending structure 18 and sealing plate 2 can be made of different shapes or detachable structure; hinge arm 17 can be connected by pin shaft, ball joint or flexible shock absorption, and the number can be adjusted; hydraulic cylinder 12 can be replaced with electric push rod or pneumatic cylinder, power unit 11 can be powered by vehicle power interface, and connecting beam 9 can be designed as telescopic structure to adapt to different specifications of magnetic attraction devices.

[0029] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A magnetic attraction device comprising a mounting upper cover plate (6), a rear hanger (13) and a magnet (3), characterized in that: Connecting brackets (10) are provided on the left and right sides of the upper surface of the mounting cover plate (6). The rear bracket (13) is hinged to the connecting bracket (10). The magnet (3) is provided on the lower surface of the mounting cover plate (6). A flip plate (4) is provided on the lower surface of the magnet (3). The flip plate (4) is rotatably connected to one side of the mounting cover plate (6). A rubber baffle (1) is provided on the left side of the flip plate (4). A locking plate (7) is provided on the upper surface of the mounting cover plate (6). A lock (8) is provided on the locking plate (7).

2. The magnetic attraction device of claim 1, wherein: The two sides of the connecting frame (10) are provided with guide wheel mounting plates (14), and the guide wheel mounting plates (14) are provided with support wheels (5).

3. The magnetic attraction device of claim 1, wherein: The cover plate (6) is surrounded by sealing plates (2), and the right side of the flap (4) is provided with an upward bending structure (18).

4. The magnetic attraction device of claim 1, wherein: A hinge arm (17) is hinged on the rear hanger (13). The other end of the hinge arm (17) is connected to the connecting frame (10). There are four hinge arms (17), with two hinge arms (17) on each side of the rear hanger (13).

5. A magnetic attraction device according to claim 1, characterized in that: It also includes a hydraulic cylinder (12), a cylinder fixing sleeve (15) is provided on the hydraulic cylinder (12), a connecting beam (9) is provided between the connecting frames (10), the telescopic end of the hydraulic cylinder (12) is rotatably connected to the connecting beam (9), the cylinder fixing sleeve (15) is rotatably connected to the fixed bracket (16), and a power unit (11) is provided on the connecting frame (10).

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