A jacking device with anti-impact function for civil aircraft maintenance

Abstract

The application discloses a jacking device with an anti-impact function for civil aircraft maintenance, and relates to the technical field of aircraft maintenance.The jacking device comprises a bottom plate and a supporting plate, the supporting plate is located on the top of the bottom plate, a jacking seat is arranged on the side of the supporting plate away from the bottom plate, a jacking assembly and a buffer assembly are arranged between the supporting plate and the bottom plate, the jacking assembly is used for jacking the supporting plate, and the buffer assembly is used for buffering after the jacking assembly fails.The jacking assembly comprises an elevator and a surrounding jacking air bag, and the air bag is wrapped around the elevator to prevent impurities from invading and mechanical damage by air inflation of an air pump.The buffer assembly comprises a fixed pipe, a buffer ring and a centrifugal set, the fixed column and the buffer ring are screw-nut transmission, when the jacking fails, the centrifugal force generated by the high-speed rotation of the buffer ring drives the swing of the centrifugal pendulum, the pawl and the ratchet wheel are engaged and locked to prevent the supporting plate from falling;the lifting operation stability is improved, and aircraft impact damage is avoided.

Description

Technical Field

[0001] This invention relates to the field of aircraft maintenance technology, specifically a lifting device for civil aircraft maintenance with shock-resistant function. Background Technology

[0002] Aircraft maintenance lifting devices are core auxiliary equipment in the civil aircraft maintenance process. Their main function is to smoothly lift the aircraft to a designated height, providing maintenance personnel with a safe and sufficient working space and ensuring the smooth progress of maintenance procedures such as fuselage inspection and component replacement.

[0003] However, existing lifting devices have many technical defects: on the one hand, the lifting components are mostly single elevator structures, which are easily invaded by dust and impurities in the maintenance environment, or damaged by collisions with other operating machinery, leading to lifting failure; on the other hand, after the lifting components fail, there is no efficient buffer and landing stop mechanism, and the aircraft is prone to fall rapidly with the support structure, generating a violent impact and causing fuselage damage. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting device for civil aircraft maintenance with shock-resistant function, so as to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A lifting device for civil aircraft maintenance with shock-resistant function includes a base plate and a support plate. The support plate is located on top of the base plate. A lifting seat is provided on the side of the support plate away from the base plate. A lifting assembly and a buffer assembly are provided between the support plate and the base plate. The lifting assembly lifts the support plate. The buffer assembly includes a fixing tube and a receiving ring groove. The fixing tube is located on the base plate, and the receiving ring groove is located on the support plate.

[0007] Preferably, the lifting assembly includes a lift and several lifting airbags. The lift is located between the support plate and the base plate, and the several lifting airbags are arranged around the axis of the lift. An air pump is provided in the base plate, and the air pump is connected to the lifting airbags through a pipe.

[0008] The controller starts the elevator. After the elevator starts, it lifts the support plate and moves it away from the bottom plate. During the movement, the support plate will move one end of the lifting airbag. During the stretching and moving of the lifting airbag, the controller starts the air pump. The air pump draws outside air into the lifting airbag through the pipe, so that the lifting airbag is continuously inflated by gas.

[0009] After the lifting airbag inflates, it encloses the elevator, thereby reducing the amount of external dust and impurities entering the elevator's working area and preventing the elevator from being damaged by other working machinery, which could lead to lifting failure.

[0010] Preferably, the storage ring groove is slidably connected to the fixing tube, the fixing tube is provided with a fixing post, the storage ring groove is provided with a buffer ring on the side near the fixing post, the buffer ring is rotatably connected to the storage ring groove, and the buffer ring is slidably connected to the fixing post.

[0011] During the lifting process, the support plate drives the storage ring groove to move, causing the storage ring groove to detach from the fixed tube. During the movement of the storage ring groove, the storage ring groove drives the buffer ring to move, causing the buffer ring to move along the axis of the fixed column.

[0012] During the descent and reset process of the support plate, the support plate drives the receiving ring groove to descend and reset. During the descent, the receiving ring groove extends into the fixed tube, and at the same time, the receiving ring groove drives the buffer ring to descend along the axis of the fixed column.

[0013] Preferably, the fixed column is provided with threads, the buffer ring is driven to the fixed column by a screw and nut, and a centrifugal assembly is provided on the side of the buffer ring near the fixed column. The centrifugal assembly buffers and stops the fall by the centrifugal force generated by the high-speed rotation of the buffer ring.

[0014] Because the fixed column is threaded, the buffer ring is driven by the screw and nut of the fixed column. This causes the receiving ring groove to move the buffer ring along the fixed column, while the buffer ring is also driven by the screw of the fixed column, causing the buffer ring to rotate. As the buffer ring moves away from the fixed tube, it drives the centrifugal assembly to move spirally along the fixed column.

[0015] Preferably, the centrifuge assembly includes a limiting ring, which is connected to a buffer ring via a bracket. The limiting ring is mounted on a fixed column and is rotatably connected to the fixed column. Two limiting grooves are symmetrically arranged on the side of the limiting ring away from the fixed column. A centrifugal pendulum is disposed in the limiting groove, and one end of the centrifugal pendulum is rotatably connected to the buffer ring via a rotating shaft.

[0016] During the spiral movement of the buffer ring, the buffer ring drives the limit ring to spiral movement through the bracket. In turn, the limit ring drives the two centrifugal pendulums to spiral movement. Since the lifting process of the elevator is relatively slow, the movement speed of the buffer ring driven by the support plate is also slow. As a result, the centrifugal force generated by the rotation of the buffer ring is small, so the gravity on the centrifugal pendulum is greater than the centrifugal force generated by the rotation of the buffer ring. Therefore, the centrifugal pendulum will not produce a large swing amplitude.

[0017] During the descent and reset process, the elevator drives the support plate to descend at a slower speed, which slows down the movement of the buffer ring along the fixed column. Consequently, the centrifugal force on the centrifugal pendulum is smaller, and the centrifugal pendulum will not generate a large swing amplitude when the elevator descends and resets, thus not interfering with the normal lifting movement of the elevator.

[0018] Preferably, a pawl is provided on the side of the centrifugal pendulum away from the fixed column, and a ratchet is provided on the inner wall of the fixed tube. The pawl and the ratchet engage during the buffering and stopping process.

[0019] When the lifting mechanism fails, the elevator, unable to support the weight of the aircraft, begins to fall. The support plate will press downwards against the lifting airbag, which cannot fully bear the weight of the support plate and the aircraft. Consequently, the support plate will continue to fall rapidly towards the base plate. During this descent, the support plate moves the buffer ring. Due to the rapid descent, the buffer ring's spiral motion along the fixed column also accelerates, increasing its rotational speed and the centrifugal force it generates. At this point, the gravitational force on the centrifugal pendulum is less than the centrifugal force generated by the buffer ring's rotation. The centrifugal pendulum generates a large swing amplitude, causing it to move along the limiting groove. As the pendulum moves towards the inner wall of the fixed tube, it drives the pawl to move, causing the pawl to engage with the ratchet. Several pawls and ratchets work together to lock the limiting ring on the fixed post. Once the limiting ring stops moving, the support plate also stops falling, thus avoiding impact damage to the aircraft caused by lifting failure. This achieves the impact protection effect of the lifting device. While the support plate is falling, the lifting airbag provides a certain degree of cushioning.

[0020] Preferably, a corrugated pipe is provided between the fixing pipe and the receiving annular groove.

[0021] By incorporating a corrugated pipe, external impurities or tools used during maintenance are prevented from falling between the fixed pipe and the receiving ring groove, thus avoiding jamming of the receiving ring groove during reset and ensuring the stability of the equipment during operation.

[0022] Preferably, a sliding tube is provided inside the receiving annular groove, and the fixing post extends into the sliding tube, with the fixing post slidably connected to the sliding tube.

[0023] During the lifting or resetting process of the support plate, the fixed column always moves inside the sliding tube, and the fixed column and the sliding tube cooperate to limit the lifting stroke of the support plate.

[0024] Preferably, the swing diameter of the centrifugal pendulum during normal lifting is smaller than the inner wall diameter of the ratchet.

[0025] During normal operation of the elevator, the lifting or resetting speed of the elevator is relatively slow. Consequently, the movement speed of the support plate driving the buffer ring to move spirally along the fixed column is also relatively slow. As a result, the rotation speed of the buffer ring is also relatively slow, which makes the diameter of the swing amplitude of the centrifugal pendulum smaller than the inner diameter of the ratchet. Therefore, when the elevator is operating normally, the centrifugal pendulum will not drive the pawl to engage with the ratchet.

[0026] When the lifting mechanism fails, the support plate drives the buffer ring to move faster along the fixed column in a spiral motion. This increases the rotation speed of the buffer ring, causing the diameter of the centrifugal pendulum's swing amplitude to be larger than the inner diameter of the ratchet. The centrifugal pendulum then drives the pawl to engage with the ratchet.

[0027] Preferably, the support plate is provided with a plurality of legs on its exterior, and the plurality of legs are arranged around the axis of the support plate.

[0028] When the elevator lifts the support plate, several outriggers move along with the support plate, providing auxiliary support to the support plate.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. The buffer assembly uses a screw and nut drive and centrifugal force triggering mechanism. When the lifting fails, the support plate falls rapidly, causing the buffer ring to rotate at high speed. The centrifugal force increases the amplitude of the centrifugal pendulum, and the pawl and ratchet engage precisely, quickly locking the limit ring and support plate to prevent the aircraft from being damaged by the impact caused by the fall. During normal lifting or resetting, the elevator runs at a slow speed, and the centrifugal force generated by the rotation of the buffer ring is small. The amplitude of the centrifugal pendulum is smaller than the inner diameter of the ratchet and will not engage with the ratchet, ensuring that normal operation is not disturbed. This means that the buffer assembly is only triggered when it fails, without affecting normal lifting and resetting operations.

[0031] 2. The lifting assembly adopts a combination design of a lift and a surrounding lifting airbag. After the air pump inflates the airbag, it can completely surround the lift, effectively blocking external dust and impurities from entering the working area of ​​the lift, while avoiding damage to the lift from external impacts, thus reducing the probability of lifting failure from the source. In addition, the lifting airbag has both auxiliary lifting and initial buffering functions. It enhances the support force during normal lifting and can initially buffer the impact of falling force in case of failure, achieving dual protection. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] Figure 2 This is a top view of the present invention;

[0034] Figure 3 This is a schematic diagram of the lifting assembly.

[0035] Figure 4 This is a top view of the lifting assembly;

[0036] Figure 5 This is a cross-sectional view of the buffer assembly.

[0037] Figure 6 This is a sectional front view of the buffer component;

[0038] Figure 7 This is a structural diagram of the buffer ring, centrifugal assembly, and fixing column;

[0039] In the diagram: 1. Base plate; 11. Support plate; 12. Support leg;

[0040] 2. Lifting assembly; 21. Lifting platform; 22. Lifting airbag;

[0041] 3. Buffer assembly; 31. Fixed tube; 32. Receiving ring groove; 321. Sliding tube; 33. Fixed column; 34. Buffer ring; 35. Centrifugal assembly; 36. Limiting ring; 37. Limiting groove; 38. Centrifugal pendulum; 39. Pawl; 40. Ratchet; 41. Bellows. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example: Figures 1-7 As shown, the present invention provides a technical solution for a lifting device for civil aircraft maintenance with shock-resistant function, including a base plate 1 and a support plate 11. The support plate 11 is located on top of the base plate 1. A lifting seat is provided on the side of the support plate 11 away from the base plate 1. A lifting assembly 2 and a buffer assembly 3 are provided between the support plate 11 and the base plate 1. The lifting assembly 2 lifts the support plate 11, and the buffer assembly 3 is used to buffer the system in case the lifting assembly 2 fails.

[0044] In one specific embodiment of the present invention, a plurality of legs 12 are provided on the outside of the support plate 11, and the plurality of legs 12 are arranged around the axis of the support plate 11.

[0045] In one specific embodiment of the present invention, the lifting assembly 2 includes a lift 21 and a plurality of lifting airbags 22. The lift 21 is located between the support plate 11 and the base plate 1. The plurality of lifting airbags 22 are arranged around the axis of the lift 21. An air pump is provided in the base plate 1, and the air pump is connected to the lifting airbags 22 through a pipe.

[0046] In one specific embodiment of the present invention, the buffer assembly 3 includes a fixed tube 31 and a receiving ring groove 32. The fixed tube 31 is located on the base plate 1, and the receiving ring groove 32 is located on the support plate 11. The receiving ring groove 32 is slidably connected to the fixed tube 31. A fixed post 33 is provided inside the fixed tube 31. A buffer ring 34 is provided on the side of the receiving ring groove 32 near the fixed post 33. The buffer ring 34 is rotatably connected to the receiving ring groove 32 and slidably connected to the fixed post 33.

[0047] In one specific embodiment of the present invention, a sliding tube 321 is provided in the receiving annular groove 32, and the fixing post 33 extends into the sliding tube 321, and the fixing post 33 is slidably connected to the sliding tube 321.

[0048] In one specific embodiment of the present invention, the fixed column 33 is provided with threads, the buffer ring 34 is driven to the fixed column 33 by a screw and nut, and a centrifugal assembly 35 is provided on the side of the buffer ring 34 near the fixed column 33. The centrifugal assembly 35 buffers and stops the fall by the centrifugal force generated by the high-speed rotation of the buffer ring 34.

[0049] In one specific embodiment of the present invention, the centrifugal assembly 35 includes a limiting ring 36, which is connected to a buffer ring 34 via a bracket. The limiting ring 36 is mounted on a fixed column 33 and is rotatably connected to the fixed column 33. Two limiting grooves 37 are symmetrically arranged on the side of the limiting ring 36 away from the fixed column 33. A centrifugal pendulum 38 is disposed in the limiting groove 37, and one end of the centrifugal pendulum 38 is rotatably connected to the buffer ring 34 via a rotating shaft.

[0050] In one specific embodiment of the present invention, a pawl 39 is provided on the side of the centrifugal pendulum 38 away from the fixed column 33, and a ratchet 40 is provided on the inner wall of the fixed tube 31. The pawl 39 and the ratchet 40 engage during the buffering and stopping process.

[0051] In one specific embodiment of the present invention, the swing diameter of the centrifugal pendulum 38 during normal lifting is smaller than the inner wall diameter of the ratchet 40.

[0052] In one specific embodiment of the present invention, a corrugated pipe 41 is provided between the fixed pipe 31 and the receiving annular groove 32.

[0053] Working principle of the invention:

[0054] The controller controls the start of the elevator 21. After the elevator 21 starts, it drives the support plate 11 to rise. The support plate 11 moves to the side away from the base plate 1. During the movement of the support plate 11, the support plate 11 will drive one end of the lifting airbag 22 to move. During the stretching and movement of the lifting airbag 22, the controller controls the start of the air pump. The air pump draws outside air into the lifting airbag 22 through the pipe, so that the lifting airbag 22 continuously receives gas and expands.

[0055] After the lifting airbag 22 inflates, it will enclose the elevator 21, thereby reducing the entry of external dust and impurities into the working range of the elevator 21, and preventing the elevator 21 from being damaged by other working machinery, which would lead to lifting failure.

[0056] During the lifting process, the support plate 11 drives the storage ring groove 32 to move, causing the storage ring groove 32 to disengage from the fixed tube 31. During the movement of the storage ring groove 32, the storage ring groove 32 drives the buffer ring 34 to move, causing the buffer ring 34 to move along the axis of the fixed column 33.

[0057] Because the fixed column 33 is threaded, the buffer ring 34 is driven by the fixed column 33 through the screw and nut, so that while the receiving ring groove 32 drives the buffer ring 34 to move along the fixed column 33, the buffer ring 34 is also driven by the fixed column 33 through the screw, causing the buffer ring 34 to rotate. As the buffer ring 34 moves away from the fixed tube 31, the buffer ring 34 drives the centrifugal assembly 35 to move spirally along the fixed column 33.

[0058] During the spiral movement of the buffer ring 34, the buffer ring 34 drives the limiting ring 36 to spiral movement through the bracket. During the movement, the limiting ring 36 drives the two centrifugal pendulums 38 to spiral movement. Since the lifting process of the elevator 21 is relatively slow, the movement speed of the buffer ring 34 driven by the support plate 11 is relatively slow. As a result, the centrifugal force generated by the rotation of the buffer ring 34 is small, so the gravity on the centrifugal pendulum 38 is greater than the centrifugal force generated by the rotation of the buffer ring 34. Therefore, the centrifugal pendulum 38 will not produce a large swing amplitude.

[0059] During the process of the support plate 11 descending and resetting, the support plate 11 drives the receiving ring groove 32 to descend and reset. During the descent, the receiving ring groove 32 extends into the fixed tube 31, and at the same time, the receiving ring groove 32 drives the buffer ring 34 to descend along the axis of the fixed column 33.

[0060] During the descent and reset process of the elevator 21, the elevator 21 drives the support plate 11 to descend at a relatively slow speed, which makes the buffer ring 34 move slowly along the fixed column 33. As a result, the centrifugal force on the centrifugal pendulum 38 is small, and the centrifugal pendulum 38 will not produce a large swing amplitude when the elevator 21 descends and resets; thus, it will not interfere with the normal lifting movement of the elevator 21.

[0061] When the lifting mechanism 21 fails to lift, it can no longer support the weight of the aircraft and begins to fall. The support plate 11 will press down on the lifting airbag 22. However, the lifting airbag 22 cannot fully support the weight of the support plate 11 and the aircraft. As a result, the support plate 11 will continue to fall rapidly towards the side closer to the base plate 1. During the fall, the support plate 11 will move the buffer ring 34. Due to the rapid fall, the buffer ring 34 will also move faster along the fixed column 33, resulting in a faster rotation speed and an increased centrifugal force generated by the buffer ring 34. At this time, the gravity on the centrifugal pendulum 38 is less than the centrifugal force generated by the rotation of the buffer ring 34. The centrifugal pendulum 38 will generate a large swing amplitude, causing it to move along the limiting groove 37. The centrifugal pendulum 38 moves towards the side closer to the inner wall of the fixed tube 31. During the movement of the centrifugal pendulum 38, the pawl 39 moves, causing it to engage with the ratchet 40. Then, several pawls 39 and ratchet 40 cooperate with each other to lock the limiting ring 36 on the fixed column 33. After the limiting ring 36 stops moving, the support plate 11 also stops falling, thus avoiding the problem of impact damage to the aircraft due to the failure of the lifting device. This achieves the impact protection effect of the lifting device. While the support plate 11 is falling, the lifting airbag 22 provides a certain buffering effect for the support plate 11.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lifting device for civil aircraft maintenance with shock-resistant function, characterized in that: The system includes a base plate (1) and a support plate (11). The support plate (11) is located on top of the base plate (1). A lifting seat is provided on the side of the support plate (11) away from the base plate (1). A lifting assembly (2) and a buffer assembly (3) are provided between the support plate (11) and the base plate (1). The lifting assembly (2) lifts the support plate (11). The buffer assembly (3) includes a fixing tube (31) and a receiving ring groove (32). The fixing tube (31) is located on the base plate (1), and the receiving ring groove (32) is located on the support plate (11). The storage ring groove (32) is slidably connected to the fixing tube (31), and a fixing post (33) is provided inside the fixing tube (31). A buffer ring (34) is provided on the side of the storage ring groove (32) near the fixing post (33). The buffer ring (34) is rotatably connected to the storage ring groove (32), and the buffer ring (34) is slidably connected to the fixing post (33). The fixed column (33) is provided with threads, and the buffer ring (34) is driven by the fixed column (33) through a screw nut. A centrifugal assembly (35) is provided on the side of the buffer ring (34) near the fixed column (33). The centrifugal assembly (35) buffers and stops the fall by the centrifugal force generated by the high-speed rotation of the buffer ring (34).

2. The lifting device for civil aircraft maintenance with shock-resistant function according to claim 1, characterized in that: The lifting assembly (2) includes a lift (21) and a plurality of lifting airbags (22). The lift (21) is located between the support plate (11) and the base plate (1). The plurality of lifting airbags (22) are arranged around the axis of the lift (21). An air pump is provided in the base plate (1), and the air pump is connected to the lifting airbags (22) through a pipe.

3. A lifting device for civil aircraft maintenance with shock-resistant function according to claim 1, characterized in that: The centrifugal assembly (35) includes a limiting ring (36), which is connected to a buffer ring (34) via a bracket. The limiting ring (36) is mounted on a fixed column (33) and is rotatably connected to the fixed column (33). Two limiting grooves (37) are symmetrically arranged on the side of the limiting ring (36) away from the fixed column (33). A centrifugal pendulum (38) is provided in the limiting groove (37), and one end of the centrifugal pendulum (38) is rotatably connected to the buffer ring (34) via a rotating shaft.

4. A lifting device for civil aircraft maintenance with impact resistance as described in claim 3, characterized in that: The centrifugal pendulum (38) is provided with a pawl (39) on the side away from the fixed column (33), and a ratchet (40) is provided on the inner wall of the fixed tube (31). The pawl (39) and the ratchet (40) engage during the buffering and stopping process.

5. A lifting device for civil aircraft maintenance with shock-resistant function according to claim 1, characterized in that: A corrugated pipe (41) is provided between the fixed pipe (31) and the receiving annular groove (32).

6. A lifting device for civil aircraft maintenance with shock-resistant function according to claim 1, characterized in that: A sliding tube (321) is provided inside the receiving annular groove (32), and the fixing post (33) extends into the sliding tube (321). The fixing post (33) is slidably connected to the sliding tube (321).

7. A lifting device for civil aircraft maintenance with shock-resistant function according to claim 4, characterized in that: The swing diameter of the centrifugal pendulum (38) during normal lifting is smaller than the inner wall diameter of the ratchet (40).

8. A lifting device for civil aircraft maintenance with shock-resistant function according to claim 1, characterized in that: The support plate (11) is provided with a number of legs (12) on its outside, and the legs (12) are arranged around the axis of the support plate (11).

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