A lifting device for aircraft heat exchanger removal

Abstract

A kind of lifting device for the dismounting of aircraft heat exchanger, it relates to the field of aircraft maintenance tool, sliding plate driving mechanism drives sliding plate to move in front-back direction, so that tray moves to the place directly below the heat exchanger in the belly of aircraft, then chassis driving mechanism drives tray to move up, tray seat driving mechanism drives tray to rotate horizontally, tray deflection driving mechanism drives tray to deflect, realize the matching of horizontal position angle of heat exchanger, finally make heat exchanger after removal be placed on tray.The chassis driving mechanism drives tray to move down, and the aircraft heat exchanger is removed from the body.The present application facilitates accurate alignment installation of aircraft heat exchanger, realizes accurate position adjustment of heat exchanger without moving the chassis, and improves the dismounting efficiency of aircraft heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of aircraft maintenance tools, specifically to a lifting device for disassembling and assembling aircraft heat exchangers. Background Technology

[0002] Chinese Patent No. CN208556527U discloses an aircraft heat exchanger disassembly and assembly device, including a mobile trolley, a hydraulic assembly mounted on the mobile trolley, a cantilever mechanism driven by the hydraulic assembly, and a tray assembly mounted on the cantilever mechanism. The hydraulic assembly drives the cantilever mechanism to move the tray assembly up and down. This aircraft heat exchanger disassembly and assembly device integrates transportation and lifting functions. By operating a hand-cranked hydraulic pump to lift the tray assembly, the heat exchanger is lifted to the aircraft belly, facilitating disassembly and assembly, improving work efficiency, reducing manpower, meeting aircraft ground maintenance requirements, and avoiding accidental damage to the heat exchanger and the risk of personnel injury. It has the advantages of simple structure and easy operation.

[0003] In actual use, although the aforementioned equipment can lift the heat exchanger to the aircraft belly for disassembly and assembly by raising and lowering the upper plate and tilting the angle, the existing device does not have a structure for rotating and finely adjusting the upper plate or moving it left and right. When the heat exchanger fixed on the upper plate is not aligned with the aircraft belly, the operator can only operate the disassembly and assembly frame on the ground to align the heat exchanger with the aircraft belly. This operation method is not only cumbersome, but also time-consuming. Summary of the Invention

[0004] In order to overcome the shortcomings of the above technologies, this utility model provides a lifting device that can precisely adjust the position of the heat exchanger without moving the base frame.

[0005] The technical solution adopted by this utility model to overcome its technical problem is: A lifting device for disassembling and assembling aircraft heat exchangers, comprising: The vehicle body has a skateboard at the top and casters at the four corners at the bottom. The skateboard drive mechanism, located in the vehicle body, is used to drive the skateboard to slide back and forth relative to the vehicle body; The chassis is located above the slide plate, and the tray seat is rotatably mounted on the chassis via a rotating shaft II, the axis of which is set in the vertical direction; The chassis drive mechanism, mounted on the slide plate, is used to drive the chassis to move vertically. The pallet seat drive mechanism is mounted on the chassis and is used to drive the pallet seat to rotate horizontally. The tray, the lower end of which is rotatably mounted on the tray base via pivot I; and The pallet deflection drive mechanism is mounted on the pallet base and is used to drive the pallet to rotate relative to the pallet base.

[0006] Preferably, the aforementioned caster wheel is a caster wheel equipped with a foot brake.

[0007] Furthermore, the aforementioned skateboard drive mechanism includes a groove disposed in the vehicle body along the length of the vehicle body, a slider slidably mounted in the groove, a screw rotatably mounted in the vehicle body, and a servo motor I mounted on the vehicle body. The skateboard is mounted on the slider. The axis of the screw is arranged back and forth in the horizontal direction. The screw and the slider are connected by a threaded transmission. The output shaft of the servo motor I is connected to the shaft end of the screw by a coaxial transmission.

[0008] Furthermore, the aforementioned chassis drive mechanism includes a support mounted vertically on the slide plate and a support rod mounted vertically on the lower end of the chassis. The tail end of the swing arm II is hinged to the support via pin II, and its head end is hinged to the support rod via pin VI. The swing arm I is located above the swing arm II and is parallel to the swing arm II. The tail end of the swing arm I is hinged to the support via pin I, and its head end is hinged to the support rod via pin V. The tail end of the hydraulic cylinder I is hinged to the slide plate via pin III, and its piston rod head end is hinged to the area between pin I and pin V on the swing arm I via pin IV. An oil pump is installed on the slide plate, and the hydraulic cylinder I is connected to the output end of the oil pump via a reversing valve. When the piston rod of the hydraulic cylinder I is fully extended, the swing arms I and II deflect upward. When the piston rod of the hydraulic cylinder I is fully retracted, the swing arms I and II deflect downward to a horizontal state.

[0009] Furthermore, the aforementioned tray seat drive mechanism includes a worm gear coaxially mounted on the rotating shaft II, a worm rotatably mounted on the chassis, and a servo motor II mounted on the chassis. The axis of the worm is arranged in the horizontal direction, the worm meshes with the worm gear, and the worm is coaxially connected to the output shaft of the servo motor II.

[0010] Furthermore, the aforementioned pallet deflection drive mechanism includes a connecting shaft rotatably mounted in the pallet seat. The axis of the connecting shaft is horizontally arranged in the front-to-back direction. Hydraulic cylinders II are respectively mounted on the head end of the connecting shaft. The piston rod heads of the hydraulic cylinders II are hinged to the bottom of the pallet. The two hydraulic cylinders II are connected to the output end of the oil pump through a reversing valve. When the piston rods of both hydraulic cylinders II are fully retracted, the pallet rotates to a horizontal state. When the piston rods of both hydraulic cylinders II are extended, the pallet rotates to a tilted state. Both hydraulic cylinders II are connected to the output end of the oil pump through a reversing valve.

[0011] To improve ease of use, a handle is also included, which is installed at the rear of the vehicle.

[0012] To improve stability, the system also includes a limiting groove that is arranged around the axis of the rotating shaft II at the upper end of the chassis and arc-shaped limiting plates that are symmetrically installed on both sides of the lower end of the tray seat. The limiting plates are arranged vertically and the bottom of the limiting plates are inserted into the limiting groove.

[0013] To enhance safety, a fixing mechanism is also included, which is set on the tray to secure the aircraft heat exchanger.

[0014] Preferably, the aforementioned fixing mechanism includes straps respectively installed at the front and rear ends of the tray.

[0015] The beneficial effects of this utility model are as follows: The sliding plate drive mechanism drives the sliding plate to move in the forward and backward direction, moving the tray to a position directly below the heat exchanger located on the aircraft's belly. Then, the chassis drive mechanism drives the tray upward, the tray seat drive mechanism drives the tray to rotate horizontally, and the tray deflection drive mechanism drives the tray to deflect, achieving matching of the horizontal position and angle of the heat exchanger. Finally, the heat exchanger is removed and placed on the tray. The chassis drive mechanism then drives the tray downward, removing the aircraft heat exchanger from the fuselage. This facilitates precise alignment and installation of the aircraft heat exchanger. It enables precise position adjustment of the heat exchanger without moving the chassis, improving the efficiency of aircraft heat exchanger assembly and disassembly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the tray part of this utility model; Figure 3 This is a three-dimensional structural diagram of the worm gear part of this utility model; Figure 4 This is a three-dimensional structural diagram of the screw part of this utility model; In the diagram, 1. Vehicle body; 2. Caster wheel; 3. Slide plate; 4. Support; 5. Swing arm I; 6. Swing arm II; 7. Pin I; 8. Pin II; 9. Screw; 10. Servo motor I; 11. Hydraulic cylinder I; 12. Pin III; 13. Pin IV; 14. Hydraulic pump; 15. Handle; 16. Support rod; 17. Pin V; 18. Pin VI; 19. Tray seat; 20. Tray; 21. Strap; 22. Rotary shaft I; 23. Hydraulic cylinder II; 24. Chassis; 25. Limiting plate; 26. Rotary shaft II; 27. Worm gear; 28. Worm; 29. ​​Limiting groove; 30. Servo motor II; 31. Slide groove; 32. Slider. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 To be continued Figure 4 The present invention will be further described below.

[0018] A lifting device for assembling and disassembling aircraft heat exchangers includes: a vehicle body 1 with a sliding plate 3 at its upper end and casters 2 at the four corners of the lower end of the vehicle body 1; a sliding plate drive mechanism disposed in the vehicle body 1 for driving the sliding plate 3 to slide back and forth relative to the vehicle body 1; a chassis 24 located above the sliding plate 3, with a tray seat 19 rotatably mounted on the chassis 24 via a pivot II 26, the axis of the pivot II 26 being arranged vertically; a chassis drive mechanism disposed on the sliding plate 3 for driving the chassis 24 to move vertically; a tray seat drive mechanism disposed on the chassis 24 for driving the tray seat 19 to rotate horizontally; a tray 20 with its lower end rotatably mounted on the tray seat 19 via a pivot I 22; and a tray deflection drive mechanism disposed on the tray seat 19 for driving the tray 20 to rotate relative to the tray seat 19. When the aircraft heat exchanger needs to be disassembled, the entire vehicle body 1 is moved to the work position via casters 2. Then, the sliding plate drive mechanism drives the sliding plate 3 to move in the forward and backward direction, moving the tray 20 directly below the location of the heat exchanger on the aircraft's belly. Next, the chassis drive mechanism drives the tray 20 upward, the tray seat drive mechanism drives the tray 19 to rotate horizontally, and the tray deflection drive mechanism drives the tray 19 to deflect, achieving alignment with the horizontal position and angle of the heat exchanger. Finally, the heat exchanger is removed and placed on the tray 19. The chassis drive mechanism then drives the tray 20 downward to remove the aircraft heat exchanger from the fuselage. When the aircraft heat exchanger needs to be installed, the repaired or new aircraft heat exchanger is placed on the tray 19. Then, the sliding plate drive mechanism drives the sliding plate 3 to move in the forward and backward direction, moving the tray 20 directly below the location of the heat exchanger on the aircraft's belly. Next, the chassis drive mechanism drives the tray 20 upward, the tray seat drive mechanism drives the tray 19 to rotate horizontally, and the tray deflection drive mechanism drives the tray 19 to deflect, aligning the aircraft heat exchanger with the installation position for precise installation. This allows for precise position adjustment of the heat exchanger without moving the chassis, improving the efficiency of aircraft heat exchanger assembly and disassembly.

[0019] In one embodiment of this utility model, the universal wheel 2 is a universal wheel with a foot brake. When the entire vehicle body 1 moves to the construction position, the operator can press the brake pedal on the universal wheel 2 to lock the universal wheel 2. At this time, the vehicle body 1 can no longer move, thus fixing the position of the vehicle body 1 and improving the reliability of use.

[0020] In one embodiment of this utility model, the skateboard drive mechanism includes a groove 31 disposed along the length of the vehicle body 1, a slider 32 slidably mounted in the groove 31, a screw 9 rotatably mounted in the vehicle body 1, and a servo motor I 10 mounted on the vehicle body 1. The skateboard 3 is mounted on the slider 32. The axis of the screw 9 is arranged back and forth in the horizontal direction. The screw 9 and the slider 32 are threadedly connected. The output shaft of the servo motor I 10 is coaxially connected to the shaft end of the screw 9. When the servo motor I 10 operates, it drives the screw 9 to rotate. Since the screw 9 and the slider 32 are threadedly connected, and the slider 32 is slidably mounted in the groove 31, the slider 32 is driven to move back and forth along the groove 31, thereby achieving the purpose of driving the skateboard 3 to move back and forth relative to the vehicle body 1.

[0021] In one embodiment of this utility model, the chassis drive mechanism includes a support 4 mounted vertically on the slide plate 3 and a support rod 16 mounted vertically on the lower end of the chassis 24. The tail end of the swing arm II 6 is hinged to the support 4 via pin II 8, and its head end is hinged to the support rod 16 via pin VI 18. The swing arm I 5 is located at the upper end of the swing arm II 6 and is parallel to the swing arm II 6. The tail end of the swing arm I 5 is hinged to the support 4 via pin I 7, and its head end is hinged to the support rod 16 via pin V 17. The tail end of the hydraulic cylinder I 11 is hinged to the slide plate 3 via pin III 12, and its piston rod head end is hinged to the area between pin I 7 and pin V 17 on the swing arm I 5 via pin IV 13. An oil pump 14 is mounted on the slide plate 3. 11 is connected to the output end of oil pump 14 via a reversing valve. When the piston rod of oil cylinder I 11 is fully extended, swing arms I 5 and II 6 deflect upwards. When the piston rod of oil cylinder I 11 is fully retracted, swing arms I 5 and II 6 deflect downwards to a horizontal state. After the piston rod of oil cylinder I 11 extends outwards, it drives swing arm I 5 to rotate upwards around pin I 7. Since swing arm I 5, support 4, swing arm II 6, and support rod 16 form a parallel four-bar linkage, swing arm II 16 rotates upwards around pin II 8, and support rod 16 rotates around pins V 17 and VI 18, keeping it vertical during upward movement, thus achieving the upward movement of the aircraft heat exchanger. When the piston rod of oil cylinder I 11 retracts inwards, swing arm I 5 rotates downwards around pin I 7, causing support rod 16 to move downwards, thus driving the downward movement of the aircraft heat exchanger.

[0022] In one embodiment of this utility model, the tray seat drive mechanism includes a worm gear 27 coaxially mounted on a rotating shaft II 26, a worm 28 rotatably mounted on a chassis 24, and a servo motor II 30 mounted on the chassis 24. The axis of the worm 28 is arranged horizontally, and the worm 28 meshes with the worm gear 27. The worm 28 is coaxially connected to the output shaft of the servo motor II 30. The servo motor II 30 drives the worm 28 to rotate. Since the worm 28 meshes with the worm gear 27, it drives the rotating shaft II 26 to rotate the tray seat 19, thereby realizing the rotation of the aircraft heat exchanger. Because the worm gear transmission has a self-locking characteristic, when the servo motor II 30 stops rotating, the worm gear 27 will no longer actively rotate, ensuring the fixed position of the aircraft heat exchanger after it has rotated to the correct position.

[0023] In one embodiment of this utility model, the pallet deflection drive mechanism includes a connecting shaft rotatably mounted in the pallet base 19. The axis of the connecting shaft is horizontally arranged in the front-to-back direction. Hydraulic cylinders II 23 are respectively mounted on the head end of the connecting shaft. The piston rod heads of the hydraulic cylinders II 23 are hinged to the bottom of the pallet 20. The two hydraulic cylinders II 23 are connected to the output end of the oil pump 14 through a reversing valve. When the piston rods of both hydraulic cylinders II 23 are fully retracted, the pallet 20 rotates to a horizontal state. When the piston rods of both hydraulic cylinders II 23 are extended, the pallet 20 rotates to an inclined state. Both hydraulic cylinders II 23 are connected to the output end of the oil pump 14 through a reversing valve. Using hydraulic cylinders II 23 to drive the pallet 20 to tilt and rotate results in a simple structure and reliable operation.

[0024] In one embodiment of this utility model, a handle 15 is also included, which is installed at the rear end of the vehicle body 1. The handle 15 facilitates the movement of the entire vehicle body 1, improving the ease of operation.

[0025] In one embodiment of this utility model, it further includes a limiting groove 29 arranged around the axis of the rotating shaft II 26 on the upper end of the chassis 24, and arc-shaped limiting plates 25 symmetrically installed on both sides of the lower end of the pallet seat 19. The limiting plates 25 are arranged vertically, and the bottom of the limiting plates 25 are inserted into the limiting groove 29. When the pallet seat 19 rotates, the limiting plates 25 rotate synchronously in the limiting groove 29. The two limiting plates 25 play a role in providing auxiliary support for the pallet seat 19, reducing the force on the rotating shaft II 26, and improving the overall stability of the equipment operation.

[0026] In one embodiment of this utility model, a fixing mechanism for securing the aircraft heat exchanger is further included, disposed on the tray 20. This fixing mechanism secures the aircraft heat exchanger to the tray 20, improving safety during use. Specifically, in this embodiment, the fixing mechanism includes straps 21 respectively installed at the front and rear ends of the tray 20. The two straps 21 facilitate the binding and securing of the aircraft heat exchanger to the tray 20, making installation and disassembly convenient and improving operational efficiency.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lifting device for disassembling and assembling aircraft heat exchangers, characterized in that, include: The vehicle body (1) has a skateboard (3) on its upper end and universal wheels (2) are installed at the four corners of the lower end of the vehicle body (1). The skateboard drive mechanism is located in the vehicle body (1) and is used to drive the skateboard (3) to slide back and forth relative to the vehicle body (1); The chassis (24) is located above the slide plate (3), and the tray seat (19) is rotatably mounted on the chassis (24) via a rotating shaft II (26), the axis of which is set in the vertical direction; The chassis drive mechanism is mounted on the slide plate (3) and is used to drive the chassis (24) to move vertically. The pallet seat drive mechanism is mounted on the chassis (24) and is used to drive the pallet seat (19) to rotate in the horizontal direction; The tray (20), the lower end of which is rotatably mounted on the tray base (19) via a pivot I (22); and The pallet deflection drive mechanism is mounted on the pallet seat (19) and is used to drive the pallet (20) to rotate relative to the pallet seat (19).

2. The lifting device for aircraft heat exchanger removal and installation of claim 1, wherein: The omnidirectional wheel (2) is an omnidirectional wheel with a foot brake.

3. The lifting device for disassembly of aircraft heat exchangers according to claim 1, characterized in that: The skateboard drive mechanism includes a slide groove (31) arranged in the vehicle body (1) along the length direction of the vehicle body (1), a slider (32) slidably installed in the slide groove (31), a screw (9) rotatably installed in the vehicle body (1), and a servo motor I (10) installed on the vehicle body (1). The skateboard (3) is installed on the slider (32). The axis of the screw (9) is arranged back and forth in the horizontal direction. The screw (9) and the slider (32) are connected by a threaded drive. The output shaft of the servo motor I (10) is connected to the shaft end of the screw (9) by a coaxial drive.

4. The lifting device for aircraft heat exchanger removal and installation of claim 1, wherein: The chassis drive mechanism includes a support (4) mounted vertically on the slide plate (3) and a support rod (16) mounted vertically on the lower end of the chassis (24). The tail end of the swing arm II (6) is hinged to the support (4) via pin II (8), and its head end is hinged to the support rod (16) via pin VI (18). The swing arm I (5) is located at the upper end of the swing arm II (6) and is parallel to the swing arm II (6). The tail end of the swing arm I (5) is hinged to the support (4) via pin I (7), and its head end is hinged to the support rod (16) via pin V (17). The tail end of cylinder I (11) is hinged to the slide plate (3) via pin III (12), and the head end of its piston rod is hinged to the area between pin I (7) and pin V (17) on the swing arm I (5) via pin IV (13). The slide plate (3) is equipped with an oil pump (14), and cylinder I (11) is connected to the output end of the oil pump (14) via a reversing valve. When the piston rod of cylinder I (11) is fully extended, the swing arm I (5) and the swing arm II (6) deflect upward. When the piston rod of cylinder I (11) is fully retracted, the swing arm I (5) and the swing arm II (6) deflect downward to a horizontal state.

5. The lifting device for disassembly of aircraft heat exchangers according to claim 1, characterized in that: The tray seat drive mechanism includes a worm gear (27) coaxially mounted on a rotating shaft II (26), a worm (28) rotatably mounted on a chassis (24), and a servo motor II (30) mounted on a chassis (24). The axis of the worm (28) is set in the horizontal direction. The worm (28) meshes with the worm gear (27), and the worm (28) is coaxially connected to the output shaft of the servo motor II (30).

6. The lifting device for aircraft heat exchanger removal and installation of claim 1, wherein: The pallet deflection drive mechanism includes a connecting shaft rotatably mounted in the pallet seat (19). The axis of the connecting shaft is horizontally arranged in the front-back direction. The head end of the connecting shaft is respectively equipped with a hydraulic cylinder II (23). The piston rod head end of the hydraulic cylinder II (23) is respectively hinged to the bottom of the pallet (20). The two hydraulic cylinders II (23) are connected to the output end of the oil pump (14) through a reversing valve. When the piston rods of the two hydraulic cylinders II (23) are fully retracted, the pallet (20) rotates to a horizontal state. When the piston rods of the two hydraulic cylinders II (23) are extended, the pallet (20) rotates to an inclined state. Both hydraulic cylinders II (23) are connected to the output end of the oil pump (14) through a reversing valve.

7. The lifting device for aircraft heat exchanger removal and installation of claim 1, wherein: It also includes a handle (15) installed at the rear of the vehicle body (1).

8. The lifting device for disassembly of aircraft heat exchangers according to claim 5, characterized in that: It also includes a limiting groove (29) surrounding the upper end of the chassis (24) with the axis of the rotating shaft II (26) as the center, and arc-shaped limiting plates (25) symmetrically installed on both sides of the lower end of the tray seat (19). The limiting plates (25) are arranged in the vertical direction, and the bottom of the limiting plates (25) is inserted into the limiting groove (29).

9. The lifting device for disassembly of aircraft heat exchangers according to claim 1, characterized in that: It also includes a fixing mechanism set on the tray (20) for fixing the aircraft heat exchanger.

10. The lifting device for disassembly of an aircraft heat exchanger according to claim 9, characterized in that: The fixing mechanism includes straps (21) installed at the front and rear ends of the tray (20).

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