Aircraft onboard electric crane lifting mechanism

Abstract

The utility model relates to aviation airborne equipment technical field, and disclose aviation airborne electric hoist lifting mechanism. The aviation airborne electric hoist lifting mechanism, including base, the surface fixed connection of base has support frame, the one side fixed connection of support frame has fixed plate, the surface fixed connection of fixed plate has stepless servo motor. Adopt stepless servo motor drive, can realize stepless smooth regulation of rotational speed, cooperate the synchronous belt drive mechanism that constitutes of driving wheel, transmission belt, driven wheel, transmission ratio accurate and no backlash error, ensure that the screw rod rotates at a constant speed, and further drive the stable lifting of connecting frame and bearing hook, servo motor can be through the programming accurate control rotation angle and rotational speed, realize millimeter level positioning of load, adapt precision instrument, fragile material etc. High-precision hoisting demand, simultaneously, the flexible characteristic of synchronous belt drive can buffer the impact when lifting speed switches, further improve the positioning stability.

Description

Technical Field

[0001] This utility model relates to the field of airborne equipment technology, and in particular to an airborne electric crane lifting mechanism. Background Technology

[0002] Airborne electric cranes, as core equipment for cargo handling and emergency rescue material hoisting in aircraft, are widely used in military transport aircraft and civilian cargo planes. The precision, stability, and safety of their lifting mechanisms directly affect the efficiency of material handling, aircraft flight safety, and personnel safety. Aviation scenarios place extremely stringent requirements on crane lifting mechanisms: they must adapt to special environments such as high altitudes, vibrations, and confined spaces, achieving smooth lifting and precise positioning of loads, while possessing sufficient structural strength and anti-interference capabilities.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: Traditional airborne crane lifting mechanisms mostly adopt gear transmission or wire rope winch structure driven by ordinary motors. Gear transmission has backlash error, and wire rope transmission is prone to elastic deformation and slippage, resulting in poor load positioning accuracy during lifting and cannot meet the high-precision positioning requirements of precision instruments, fragile materials, etc. At the same time, ordinary motors are difficult to achieve stepless speed adjustment, and impact is easily generated when switching lifting speeds, further aggravating positioning deviation.

[0004] Insufficient transmission stability and severe load sway: During flight, aircraft experience continuous vibrations. The rigid connections of traditional transmission structures are easily affected by vibrations, leading to transmission jamming, impacts, and even chain detachment and gear wear. Wire rope hoisting structures are prone to wire rope swaying during load lifting and lowering, causing load swaying. Especially at high altitudes or in confined cargo holds, the swaying load may collide with the aircraft structure or personnel, causing safety accidents. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of backlash error in traditional gear transmission and elastic deformation and slippage in wire rope transmission. To address this, we propose an airborne electric crane lifting mechanism.

[0006] To achieve the above objectives, this application adopts the following technical solution: an airborne electric crane lifting mechanism, including a base, a support frame fixedly connected to the surface of the base, a fixed plate fixedly connected to one side of the support frame, a stepless servo motor fixedly connected to the surface of the fixed plate, a drive wheel fixedly connected to the output end of the stepless servo motor, a transmission belt adapted to the arc surface of the drive wheel, a mounting plate fixedly connected to one side of the support frame, a threaded rod slidably inserted into the mounting plate, a driven wheel fixedly connected to one end of the threaded rod, the transmission belt wound between the arc surfaces of the drive wheel and the driven wheel to form a synchronous belt transmission mechanism, a connecting frame threadedly connected to the arc surface of the threaded rod, and a bearing hook fixedly connected to one side of the connecting frame.

[0007] Preferably, the inner surface of the support hook has anti-slip grooves.

[0008] Preferably, a semi-circular plate is fixedly connected to the surface of the support frame, a lead screw is threaded into the semi-circular plate, one end of the lead screw is rotatably connected to a mounting bracket, and a roller is fixedly connected to the inner surface of the mounting bracket, with the roller abutting against the surface of the transmission belt.

[0009] Preferably, a limiting plate is slidably inserted inside the semi-circular plate, and one side of the limiting plate is fixedly connected to the mounting frame.

[0010] Preferably, a handle is fixedly connected to the other end of the lead screw.

[0011] Preferably, a U-shaped frame is fixedly connected to the surface of the support frame, and the connecting frame is slidably connected to the inner surface of the U-shaped frame.

[0012] Preferably, the bottom of the support frame is fixedly connected with an anti-slip pad.

[0013] The technical effects and advantages of this utility model are as follows: It adopts a stepless servo motor drive, which enables stepless and smooth speed adjustment. Combined with a synchronous belt drive mechanism consisting of a drive pulley, transmission belt, and driven pulley, the transmission ratio is precise and there is no backlash error, ensuring the threaded rod rotates at a uniform speed, thereby driving the connecting frame and the load-bearing hook to rise and fall smoothly. The servo motor can be precisely controlled by programming to adjust the rotation angle and speed, achieving millimeter-level positioning of the load, suitable for high-precision lifting requirements such as precision instruments and fragile materials. Simultaneously, the flexibility of the synchronous belt drive can buffer the impact during speed switching, further improving positioning stability. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0015] Figure 1This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 In this utility model Figure 1 Another structural diagram from a different angle;

[0017] Figure 3 This is a schematic diagram of the structure of the fixing plate in this utility model;

[0018] Figure 4 In this utility model Figure 2 Enlarged view of point A.

[0019] Illustration: 1. Base; 2. Support frame; 3. Fixing plate; 4. Stepless servo motor; 5. Drive wheel; 6. Setting plate; 7. Threaded rod; 8. Driven wheel; 9. Transmission belt; 10. Connecting frame; 11. Bearing hook; 12. Anti-slip groove; 13. Semicircular plate; 14. Lead screw; 15. Mounting frame; 16. Roller; 17. Limiting plate; 18. Handle; 19. U-shaped frame; 20. Anti-slip mat. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0021] Reference Figure 1-4As shown, this utility model provides a technical solution: an airborne electric crane lifting mechanism, including a base 1, a support frame 2 fixedly connected to the surface of the base 1, a fixing plate 3 fixedly connected to one side of the support frame 2, a stepless servo motor 4 fixedly connected to the surface of the fixing plate 3, a drive wheel 5 fixedly connected to the output end of the stepless servo motor 4, a transmission belt 9 adapted to the arc surface of the drive wheel 5, a setting plate 6 fixedly connected to one side of the support frame 2, a threaded rod 7 slidably inserted in the setting plate 6, a driven wheel 8 fixedly connected to one end of the threaded rod 7, and the transmission belt 9 wound between the arc surfaces of the drive wheel 5 and the driven wheel 8 to form a synchronous belt transmission mechanism. A connecting frame 10 is threadedly connected to the arc surface of the threaded rod 7, and a bearing hook 11 is fixedly connected to one side of the connecting frame 10. Driven by a stepless servo motor 4, the speed can be smoothly adjusted steplessly. Combined with the synchronous belt drive mechanism consisting of the drive pulley 5, transmission belt 9, and driven pulley 8, the transmission ratio is precise and there is no backlash error, ensuring that the threaded rod 7 rotates at a constant speed, thereby driving the connecting frame 10 and the load hook 11 to rise and fall smoothly. The servo motor can be precisely controlled by programming to control the rotation angle and speed, achieving millimeter-level positioning of the load, which is suitable for high-precision lifting requirements such as precision instruments and fragile materials. At the same time, the flexibility of the synchronous belt drive can buffer the impact when switching lifting speeds, further improving positioning stability.

[0022] Reference Figure 1 As shown in this embodiment, the inner surface of the load-bearing hook 11 has anti-slip grooves 12. The load-bearing hook 11 is used to hook and lift materials. The anti-slip grooves 12 on its inner surface can increase the friction between the hook and the material. Especially during aircraft flight vibration or load lifting and lowering, the anti-slip grooves 12 can prevent the material hook from sliding inside the load-bearing hook 11, avoiding material displacement and slippage caused by vibration, ensuring the lifting safety of critical loads such as precision instruments and fragile materials, and solving the problem of slippage caused by the smooth surface of traditional load-bearing hooks 11.

[0023] Reference Figure 3 As shown in this embodiment: a semi-circular plate 13 is fixedly connected to the surface of the support frame 2. A lead screw 14 is threaded into the semi-circular plate 13. One end of the lead screw 14 is rotatably connected to a mounting frame 15. A roller 16 is fixedly connected to the inner surface of the mounting frame 15, and the roller 16 abuts against the surface of the transmission belt 9. After long-term use, the transmission belt 9 may become loose due to wear and aging, resulting in transmission slippage and transmission ratio deviation. By rotating the lead screw 14, the mounting frame 15 can be pushed to move radially along the semi-circular plate 13, so that the roller 16 presses against the surface of the transmission belt 9, adjusting the belt tension. When the tension is insufficient, tighten the lead screw 14 to increase the pressure and restore the belt to a taut state. When the tension is too high, loosen the lead screw 14 to reduce the pressure, avoiding excessive stretching and damage to the belt, ensuring that the transmission belt 9 is always in the optimal transmission state, and avoiding a decrease in lifting accuracy and load swaying caused by belt loosening.

[0024] Reference Figure 4 As shown in this embodiment: a limiting plate 17 is slidably inserted inside the semicircular plate 13, and one side of the limiting plate 17 is fixedly connected to the mounting frame 15. When the adjusting screw 14 pushes the mounting frame 15 to move, the limiting plate 17 can slide along the inner wall of the semicircular plate 13, forming a guiding constraint on the mounting frame 15, preventing the mounting frame 15 from twisting or shifting due to the rotation of the screw 14; ensuring that the roller 16 always abuts against the surface of the transmission belt 9 in parallel, so that the belt tension is evenly distributed, avoiding belt wear caused by excessive local tension or slippage caused by insufficient local tension, and improving the tension adjustment accuracy.

[0025] Reference Figure 4 As shown in this embodiment, a handle 18 is fixedly connected to the other end of the lead screw 14. The design of the handle 18 allows the operator to directly rotate the lead screw 14 to adjust the belt tension without the need for tools such as wrenches or pliers. Especially in scenarios where space is limited in the aircraft cargo hold and tools are inconvenient to carry, the handle 18 can greatly simplify the operation, allowing a single person to complete the tension adjustment. This avoids the cumbersome operation of traditional handleless lead screw 14 systems that require tool assistance, thus improving maintenance convenience.

[0026] Reference Figure 4 As shown in this embodiment: a U-shaped frame 19 is fixedly connected to the surface of the support frame 2, and the connecting frame 10 is slidably connected to the inner surface of the U-shaped frame 19. When the connecting frame 10 drives the load hook 11 to lift and lower the load, the U-shaped frame 19 can form a longitudinal guiding constraint on the connecting frame 10, preventing the connecting frame 10 from shifting laterally due to the rotation of the threaded rod 7; especially when the load is lifted and lowered to a high position or when the aircraft vibrates, the U-shaped frame 19 can ensure that the connecting frame 10 always moves in the vertical direction, avoiding the load from shaking or rotating due to the offset of the connecting frame 10, further improving the stability of load hoisting and preventing collision with the aircraft cargo hold structure.

[0027] Reference Figure 1 As shown in this embodiment, the bottom of the support frame 2 is fixedly connected to an anti-slip pad 20. The support frame 2 is installed on the aircraft cargo hold floor via the base 1. The anti-slip pad 20 at its bottom can increase the friction with the cargo hold floor. Especially during aircraft takeoff, landing, or sharp turns, equipment in the cargo hold is prone to shifting due to inertia. The anti-slip pad 20 can prevent the support frame 2 and the base 1 from sliding as a whole, ensuring the stability of the lifting mechanism installation position and avoiding malfunctions such as misalignment of transmission components and load collision caused by mechanism displacement.

[0028] Working principle: The base 1 is placed in the preset installation position in the aircraft cargo hold and fixed to the cargo hold floor by bolts and other connecting parts; the anti-slip pad 20 fixed at the bottom of the support frame 2 is in close contact with the cargo hold floor. On the one hand, it increases the friction between the support frame 2 and the ground, preventing the mechanism from shifting due to inertia when the aircraft takes off, lands, or makes sharp turns; on the other hand, the anti-slip pad 20 can absorb the vibration during the aircraft's flight, reduce the transmission of the mechanism's vibration to the cargo hold floor, avoid ground wear and structural fatigue, and at the same time reduce the vibration noise during the operation of the mechanism, thus improving the cargo hold operating environment.

[0029] During the fixing process, ensure that the fixing plate 3 and the setting plate 6 on the surface of the support frame 2 are in a horizontal state to ensure the verticality of the subsequent installation of transmission components and the load lifting trajectory; if the cargo hold floor material is different, the anti-slip mat 20 can be adapted to different surfaces to ensure that the mechanism can be stably fixed on various types of ground, and avoid scratches and corrosion caused by the metal support frame 2 directly contacting the ground.

[0030] Handle 18 drives lead screw 14 to rotate on the internal thread of semicircular plate 13. If the transmission belt 9 becomes loose due to wear or aging, rotate handle 18 clockwise. Lead screw 14 pushes mounting bracket 15 to move radially towards the belt along semicircular plate 13. Roller 16 on the inner surface of mounting bracket 15 presses against the surface of transmission belt 9, increasing belt tension. If belt tension is too high, rotate handle 18 counterclockwise. Lead screw 14 pulls mounting bracket 15 away from the belt, reducing the pressure of roller 16 on the belt and lowering tension until the belt is in the optimal transmission state.

[0031] During adjustment, the limiting plate 17, which is slidably inserted inside the semicircular plate 13, slides along the inner wall of the semicircular plate 13, forming a guiding constraint on the mounting frame 15, preventing the mounting frame 15 from twisting or shifting due to the rotation of the lead screw 14; ensuring that the roller 16 always abuts against the surface of the transmission belt 9 in parallel, so that the belt tension is evenly distributed between the driving wheel 5 and the driven wheel 8, avoiding belt wear caused by excessive local tension or slippage caused by insufficient local tension, improving the tension adjustment accuracy, and simplifying the operation process. There is no need to frequently calibrate the position of the mounting frame 15, and a single person can complete the adjustment in the small space of the cargo hold.

[0032] After the transmission adjustment is completed, the load hook and parameter settings are performed before hoisting. The hook of the material to be hoisted is hooked into the load hook 11. The anti-slip groove 12 on the inner surface of the load hook 11 can increase the friction between the hook and the material hook. Even if the aircraft vibrates during flight or during subsequent load lifting and lowering, it can prevent the hook from sliding in the load hook 11 and avoid the material from shifting or slipping. The groove structure of the anti-slip groove 12 can be adapted to hooks of different diameters and shapes, forming a limiting effect on the hook, avoiding "virtual hooking", ensuring that all kinds of materials can be stably gripped, and expanding the load adaptation range of the mechanism.

[0033] Based on the load weight and hoisting height requirements, the speed and rotation angle of the stepless servo motor 4 are set by programming. For example, when hoisting precision instruments, a lower speed is set to ensure smooth lifting and lowering of the load, and a precise rotation angle is set to achieve millimeter-level positioning. The synchronous belt drive mechanism has no backlash error and can accurately transmit the motor power to the threaded rod 7, ensuring accurate lifting and lowering of the load in the future.

[0034] After preparation, the starting mechanism achieves smooth and precise lifting and lowering of the load, starts the stepless servo motor 4, and the motor output drives the drive wheel 5 to rotate. The drive wheel 5 drives the driven wheel 8 to rotate synchronously through the transmission belt 9 (the synchronous belt transmission ratio is precise and there is no slippage). The driven wheel 8 is fixed to one end of the threaded rod 7, thereby driving the threaded rod 7 to rotate within the setting plate 6 (the setting plate 6 supports the threaded rod 7 to ensure its rotational stability). Since the threaded rod 7 is threadedly connected to the connecting frame 10, when the threaded rod 7 rotates, the connecting frame 10 rises and falls vertically along the axis of the threaded rod 7, driving the load-bearing hook 11 fixed on one side to rise and fall synchronously with the load.

[0035] Lifting stability and precision assurance: During the lifting process of the connecting frame 10, the U-shaped frame fixed on the surface of the support frame 2 forms a longitudinal guiding constraint on the connecting frame 10. The inner surface of the U-shaped frame slides with the connecting frame 10, limiting the lateral displacement of the connecting frame 10 (such as left and right swaying). Especially when the load is lifted to a high position or when the aircraft vibrates, it ensures that the connecting frame 10 always moves in the vertical direction, avoiding the load from swaying or rotating due to displacement, and preventing collision with the cargo hold structure. At the same time, the U-shaped frame can share the radial force generated by the connecting frame 10 and the load (such as the lateral force of the load swaying), avoiding the threaded rod 7 from bearing the single axial force + radial force for a long time, causing thread wear and deformation, extending the life of the threaded rod 7, and reducing the risk of load falling. The stepless speed regulation characteristics of the stepless servo motor 4 can buffer the impact when the lifting speed is switched. Combined with the flexibility of the synchronous belt drive, it further ensures the smooth lifting of the load and meets the lifting requirements of precision instruments and fragile materials.

[0036] After the load is hoisted to the target position (or unloaded), the mechanism is reset and its status is checked. The load is removed from the load-bearing hook 11, and the stepless servo motor 4 is started in reverse to drive the threaded rod 7 to rotate in the opposite direction, so that the connecting frame 10 and the load-bearing hook 11 are lowered to the initial low position. If the load needs to be stopped for a long time, the tension of the transmission belt 9 is checked again and finely adjusted to a loose state by using the handle 18 (to avoid the belt from being too tight and aging for a long time). At the same time, the anti-slip groove 12 on the inner surface of the load-bearing hook 11 is cleaned.

[0037] Check whether the anti-slip mat 20 is intact (whether it is worn or deformed), whether the connection between the limit plate 17 and the mounting bracket 15 is firm, and whether the transmission belt 9 has cracks. Ensure that all components of the mechanism are in normal condition and prepare for the next hoisting. The whole process does not require complicated disassembly, is easy to maintain, and meets the requirements of efficient operation of aviation equipment.

[0038] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An airborne electric crane lifting mechanism, characterized in that, The system includes a base (1), a support frame (2) fixedly connected to the surface of the base (1), a fixed plate (3) fixedly connected to one side of the support frame (2), a stepless servo motor (4) fixedly connected to the surface of the fixed plate (3), a drive wheel (5) fixedly connected to the output end of the stepless servo motor (4), a transmission belt (9) adapted to the arc surface of the drive wheel (5), a setting plate (6) fixedly connected to one side of the support frame (2), a threaded rod (7) slidably inserted in the setting plate (6), a driven wheel (8) fixedly connected to one end of the threaded rod (7), and the transmission belt (9) wound between the arc surfaces of the drive wheel (5) and the driven wheel (8) to form a synchronous belt transmission mechanism. A connecting frame (10) is threadedly connected to the arc surface of the threaded rod (7), and a bearing hook (11) is fixedly connected to one side of the connecting frame (10).

2. The airborne electric crane lifting mechanism according to claim 1, characterized in that: The inner surface of the carrying hook (11) begins to have anti-slip grooves (12).

3. The airborne electric crane lifting mechanism according to claim 1, characterized in that: A semi-circular plate (13) is fixedly connected to the surface of the support frame (2). A screw (14) is threaded into the semi-circular plate (13). One end of the screw (14) is rotatably connected to a mounting frame (15). A roller (16) is fixedly connected to the inner surface of the mounting frame (15). The roller (16) abuts against the surface of the transmission belt (9).

4. The airborne electric crane lifting mechanism according to claim 3, characterized in that: A limiting plate (17) is slidably inserted inside the semi-circular plate (13), and one side of the limiting plate (17) is fixedly connected to the mounting bracket (15).

5. The airborne electric crane lifting mechanism according to claim 3, characterized in that: The other end of the lead screw (14) is fixedly connected to a handle (18).

6. The airborne electric crane lifting mechanism according to claim 1, characterized in that: The surface of the support frame (2) is fixedly connected to a U-shaped frame (19), and the connecting frame (10) is slidably connected to the inner surface of the U-shaped frame (19).

7. The airborne electric crane lifting mechanism according to claim 1, characterized in that: The bottom of the support frame (2) is fixedly connected to an anti-slip pad (20).

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