Working ladder for rear equipment compartment of airplane

Abstract

The utility model relates to the technical field of aircraft maintenance equipment, and discloses a working ladder for a rear equipment compartment of an aircraft. The working ladder for the rear equipment compartment of the airplane comprises a base, a lifting mechanism and a working platform, the lifting mechanism is movably arranged on the base in the vertical direction, and the length of the lifting mechanism in the vertical direction is adjustable; the working platform comprises a first operating platform and a second operating platform, the first operating platform is connected with the lifting mechanism, the length of the first operating platform in the first direction is adjustable, and the second operating platform is provided with a recycling position stacked with the first operating platform and a working position located on one side of the first operating platform in the second direction; the second operation platform is detachably connected with the first operation platform. According to the working ladder for the rear equipment compartment of the airplane, the movable range of workers in the rear equipment compartment is expanded, the working ladder is convenient and rapid to operate, and the safety of the overhauling process is also ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of aircraft maintenance equipment, and in particular relates to a working ladder for the rear equipment compartment of an aircraft. Background Technology

[0002] After the aft equipment bay is assembled, a work platform needs to be built inside. Workers can then use this platform to troubleshoot potential faults and perform functional tests on various equipment (such as spherical frames, fuel systems, and inerting systems) to ensure the aircraft's normal operation. However, the numerous pipes and complex structure within the aft equipment bay make the work platform construction process not only cumbersome but also extremely prone to damaging the bay's structure. This is especially true for aircraft like the C909 with narrow aft equipment bay entrances, where building the work platform is even more difficult. Furthermore, the available space for the work platform is limited, making it insufficient for the needs of aft equipment bay maintenance.

[0003] To address these issues, existing technologies employ an independent, liftable, and horizontally extendable work platform. Regardless of whether the aircraft is in a raised or landed position, the work platform can be moved to the rear equipment bay door and accessed via the narrow door. It can then be extended horizontally to reach the work area, facilitating maintenance of the rear equipment bay. However, these existing work platforms, once extended, are often elongated structures. This limits the work to the spherical frame within the rear equipment bay, preventing access to the inerting systems on either side. Access to the inerting systems requires moving or rotating the entire platform, which is inconvenient and poses a safety hazard due to the risk of contact with the aircraft.

[0004] Therefore, there is an urgent need for a working ladder for the rear equipment compartment of an aircraft to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a working ladder for the rear equipment compartment of an aircraft, which provides operating space for workers to carry out maintenance in both the depth and width directions of the rear equipment compartment, expands the range of movement of workers in the rear equipment compartment, and the working ladder is convenient and quick to operate, while also ensuring the safety of the maintenance process.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A working ladder for an aircraft aft equipment compartment is provided, comprising:

[0008] Base;

[0009] The lifting mechanism is movably mounted on the base in the vertical direction, and the extension length of the lifting mechanism in the vertical direction is adjustable.

[0010] A working platform is located on top of a lifting mechanism. The working platform includes a first operating platform and a second operating platform. The first operating platform is connected to the lifting mechanism, and the extension length of the first operating platform along a first direction is adjustable. The second operating platform has a retractable position and a working position. In the retractable position, the second operating platform is stacked on top of the first operating platform. In the working position, the second operating platform is located on one side of the first operating platform along a second direction and is detachably connected to the first operating platform. The first direction is perpendicular to the second direction.

[0011] Optionally, the first operating platform includes multiple extension platforms and multiple connectors. Any two adjacent extension platforms are connected by connectors, and the two ends of the connectors are rotatably connected to the corresponding two extension platforms. The multiple extension platforms have a first position stacked on top of each other and a second position arranged in a stepped manner. Driving the connectors to rotate allows the corresponding two extension platforms to switch between the first position and the second position. The extension platform at the bottom layer is connected to the lifting mechanism. When in the retraction position, the second operating platform is stacked on the top extension platform.

[0012] Optionally, a limit post is provided on the topmost extension platform, and a limit hole is provided on the second operating platform. When the retraction position is reached, the limit post can be inserted into the limit hole.

[0013] Optionally, the first operating platform is provided with a slot on its side wall along the second direction, and the second operating platform is provided with a block on its side wall along the second direction. When in the working position, the block is engaged in the slot.

[0014] And / or, the work platform also includes fasteners, which, in the working position, pass through the second operating platform and are secured to the first operating platform.

[0015] Optionally, the lifting mechanism includes multiple lifting components connected in a vertical direction, and any two adjacent lifting components are slidably connected. The uppermost lifting component is connected to the work platform, and the lowermost lifting component is slidably connected to the base.

[0016] Optionally, the lifting assembly includes an annular bracket, which is movably fitted onto the annular bracket of an adjacent lifting assembly in the vertical direction.

[0017] The annular support is provided with a first pulley and a first guide groove extending in a vertical direction. The first pulley is rotatably disposed in the first guide groove of an adjacent annular support.

[0018] And / or, the annular bracket is provided with a first sliding groove and a first slider, the first sliding groove extends in the vertical direction, the first slider is embedded in the first sliding groove of the adjacent annular bracket, and slides in cooperation with the corresponding first sliding groove.

[0019] Optionally, the working ladder for the aircraft's aft equipment compartment also includes multiple sets of locking assemblies. Each locking assembly includes a locking bar and a locking member. The locking bar is disposed in one of any two adjacent sets of lifting assemblies, and the locking member is movably disposed in the base or in the other of any two adjacent sets of lifting assemblies along the locking direction. The locking bar is provided with multiple locking grooves arranged continuously in the vertical direction, and the locking member has a locking position that is inserted into any locking groove of the corresponding locking member and a sliding position that is disengaged from the corresponding locking groove.

[0020] Optionally, the lifting mechanism further includes a first linear drive unit disposed on the base, the output end of the first linear drive unit being connected to the uppermost lifting component for driving the uppermost lifting component to move in the vertical direction.

[0021] Optionally, the base is provided with several second linear drive units, the output end of which is connected to the lifting mechanism to drive the lifting mechanism to move in the vertical direction.

[0022] Optionally, a detachable first guardrail is provided on the first operating platform, and a detachable second guardrail is provided on the second operating platform. When in the recovery position, the first guardrail is separated from the first operating platform, and the second guardrail is separated from the second operating platform. When in the working position, the first guardrail is connected to the first operating platform, and the second guardrail is connected to the second operating platform.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This invention provides a working ladder for an aircraft aft equipment compartment. A lifting mechanism is movably mounted vertically on a base, and its length is adjustable in the vertical direction. This allows for a wide range of height adjustment for the working platform at the top of the lifting mechanism, enabling the platform to move to the aft equipment compartment door and enter the compartment regardless of whether the aircraft is in a raised or landed position. Once inside the compartment, a first operating platform extends along a first direction to the desired maintenance location within the compartment. Workers can then stand on the first operating platform and inspect components such as spherical frames along the first direction, providing operational space for inspections along the depth of the compartment. During the extension of the first operating platform, a second operating platform is positioned in a retracted position, stacked on top of the first. This ensures the second operating platform extends into the compartment along with the first, preventing collisions with the internal structure and guaranteeing safety during maintenance. After the first operating platform is extended to the position to be inspected, the second operating platform is moved from the recovery position to the working position. The second operating platform is located on one side of the first operating platform along the second direction, so that the staff can stand on the second operating platform to inspect the inerting system and other components of the rear equipment compartment along the second direction. This provides the staff with operating space for inspection along the width of the rear equipment compartment, expands the range of inspection that the staff can perform in the rear equipment compartment, and does not require moving the entire working ladder, making the operation convenient. Attached Figure Description

[0025] Figure 1 A schematic diagram of the working ladder for the rear equipment compartment of an aircraft provided by this utility model;

[0026] Figure 2 A schematic diagram of the structure of the working ladder for storing the rear equipment compartment of an aircraft provided by this utility model;

[0027] Figure 3 A schematic diagram of the working platform for the working ladder in the rear equipment compartment of an aircraft provided by this utility model;

[0028] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 5 A first structural schematic diagram of the lifting assembly for the working ladder in the rear equipment compartment of an aircraft provided by this utility model;

[0030] Figure 6 This is a second structural schematic diagram of the lifting assembly for the working ladder in the rear equipment compartment of an aircraft provided by this utility model.

[0031] Figure 7A schematic diagram of the structure of the base of the working ladder for the rear equipment compartment of an aircraft provided by this utility model;

[0032] Figure 8 A schematic diagram of the structure of the lowermost lifting assembly of the working ladder for the rear equipment compartment of an aircraft provided by this utility model;

[0033] Figure 9 for Figure 1 Enlarged view of point B in the middle;

[0034] Figure 10 A side view of the base of the working ladder for the rear equipment compartment of an aircraft provided by this utility model.

[0035] in:

[0036] 1. Base; 11. Storage slot; 12. Second guide slot; 13. Second slider; 14. Second linear drive component; 15. Control component; 16. Toolbox; 17. Traveling wheel;

[0037] 2. Lifting mechanism; 21. Lifting assembly; 211. Circular bracket; 212. First pulley; 213. First guide groove; 214. First slide groove; 215. First slider; 216. Second pulley; 217. Second slide groove; 218. Mounting base; 2181. Limiting groove; 22. First linear drive component;

[0038] 3. Working platform; 31. First operating platform; 311. Extension platform; 3111. Mounting bracket; 3112. Support plate; 3113. Slot; 312. Connector; 313. Limiting post; 314. First guardrail; 32. Second operating platform; 321. Limiting hole; 322. Locking block; 323. Second guardrail; 33. Fastener;

[0039] 4. Locking assembly; 41. Locking bar; 411. Locking groove; 42. Locking element; 421. Limiting part. Detailed Implementation

[0040] It should be understood that in the description of this utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 simplifying the description, 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.

[0041] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 10 As shown, this embodiment provides a working ladder for the rear equipment compartment of an aircraft, which provides operating space for workers to carry out maintenance in both the depth and width directions of the rear equipment compartment, expands the range of movement of workers in the rear equipment compartment, and the working ladder is convenient and quick to operate, while also ensuring the safety of the maintenance process.

[0044] See Figure 1 , Figure 2 and Figure 3 The working ladder for the aircraft's rear equipment compartment includes a base 1, a lifting mechanism 2, and a working platform 3. The lifting mechanism 2 is located in the vertical direction. Figure 1 The lifting mechanism 2 is movably mounted on the base 1 in the Z direction, and its vertical extension length is adjustable; the working platform 3 is mounted on top of the lifting mechanism 2, and the working platform 3 includes a first operating platform 31 and a second operating platform 32. The first operating platform 31 is connected to the lifting mechanism 2, and the first operating platform 31 extends along the first direction (Z direction). Figure 1 The extension length (in the X direction) is adjustable. The second operating platform 32 has a retrieval position and a working position. (See reference...) Figure 2 When retrieving the location, the second operating platform 32 is stacked on top of the first operating platform 31. (See reference...) Figure 3 When in the working position, the second operating platform 32 is located on the first operating platform 31 along the second direction ( Figure 1 The rear equipment compartment is located on one side (in the Y direction) and is detachably connected to the first operating platform 31. The first direction is perpendicular to the second direction. The first direction is the depth direction of the rear equipment compartment, and the second direction is the width direction of the rear equipment compartment.

[0045] The working ladder for the aircraft's aft equipment compartment provided in this embodiment has a lifting mechanism 2 movably mounted vertically on the base 1. The length of the lifting mechanism 2 is adjustable in the vertical direction, allowing for a wide range of height adjustment for the working platform 3 located at the top of the lifting mechanism 2. This ensures that the working platform 3 can move to the aft equipment compartment door and enter the compartment regardless of whether the aircraft is in a raised or landed state. After the working platform 3 enters the aft equipment compartment, it drives the first operating platform 31 to extend along a first direction, extending it to the position to be inspected within the aft equipment compartment. At this time, workers can stand on the first operating platform 31 and inspect components such as the spherical frame within the aft equipment compartment along the first direction, providing operating space for workers to inspect along the depth direction of the aft equipment compartment. During the extension of the first operating platform 31, the second operating platform 32 is in the retracted position, stacked on top of the first operating platform 31. That is, the second operating platform 32 can extend into the aft equipment compartment along with the first operating platform 31, and the second operating platform 32 will not collide with the internal structure of the aft equipment compartment, ensuring the safety of the inspection process. After the first operating platform 31 is extended to the position to be inspected, the second operating platform 32 is moved from the recovery position to the working position. The second operating platform 32 is located on one side of the first operating platform 31 along the second direction, so that the staff can stand on the second operating platform 32 to inspect the inerting system and other components of the rear equipment compartment along the second direction. This provides the staff with operating space for inspection along the width of the rear equipment compartment, expands the range of inspection that the staff can perform in the rear equipment compartment, and does not require moving the entire working ladder, making the operation convenient.

[0046] Optionally, see Figure 2 and Figure 3 The first operating platform 31 includes multiple extension platforms 311 and multiple connectors 312. Any two adjacent extension platforms 311 are connected by connectors 312, and both ends of the connectors 312 are rotatably connected to the corresponding two extension platforms 311. The multiple extension platforms 311 have a first stacked position and a second stepped arrangement position. Driving the connectors 312 to rotate allows the corresponding two extension platforms 311 to switch between the first and second positions. The extension platform 311 at the bottom layer is connected to the lifting mechanism 2. In the retracted position, the second operating platform 32 is stacked on top of the top extension platform 311. In the second position, the multiple extension platforms 311 are arranged in a stepped manner along the first direction. Compared to the first position where they are stacked, the total length of the multiple extension platforms 311 along the first direction changes, thereby realizing the adjustment of the extension length of the first operating platform 31 along the first direction.

[0047] Specifically, see Figure 3When the first operating platform 31 needs to be extended to the position to be inspected, the staff first pushes the second-lowest extension platform 311 to move along the first direction. The second-lowest extension platform 311 drives the corresponding connecting piece 312 to rotate. The other end of the connecting piece 312 rotates relative to the lowest extension platform 311. The second-lowest extension platform 311 drives each layer of extension platforms 311 above it to gradually move to the side of the lowest extension platform 311 along the first direction. The height of the second-lowest extension platform 311 is still higher than the height of the lowest extension platform 311. This completes the switching of the second-lowest extension platform 311 from the first position of mutual stacking to the second position of stepped arrangement. During the switching process, the two extension platforms 311 can always maintain a stable connection through the connecting piece 312. When it is necessary to further extend the length of the first operating platform 31, the operator can push the third-level extension platform 311 from the bottom up along the first direction until the third-level extension platform 311, the next-lowest extension platform 311, and the bottommost extension platform 311 are arranged in a stepped manner, and the third-level extension platform 311 from the bottom up switches from the first position to the second position. The way the other extension platforms 311 switch from the first position to the second position is the same as that of the next-lowest extension platform 311 and the third-level extension platform 311 from the bottom up, and will not be described again here.

[0048] For example, see Figure 3 There are 3 extension platforms 311.

[0049] In this embodiment, the end of the connector 312 is provided with a rotating hole, and a connecting shaft is provided on the side wall of the extension platform 311. The connecting shaft passes through the rotating hole and is rotatably connected to the wall of the rotating hole, so as to realize the rotatable connection between the extension platform 311 and the connector 312. (See reference...) Figure 3 When the extension platform 311 switches from the first position to the second position, the end of the connector 312 connected to the upper extension platform 311 moves from the left side of the end connected to the lower extension platform 311 to the right side of the end connected to the lower extension platform 311, so that the upper extension platform 311 can move a larger distance along the first direction, thereby increasing the length that the first operating platform 31 can extend along the first direction.

[0050] For example, see Figure 3 Each extension platform 311 is provided with a connector 312 on both sides along the second direction, and two connectors 312 are provided on each side to ensure the uniformity of force on each extension platform 311 along the second direction, prevent the extension platform 311 from overturning, and also improve the strength of the connection between two adjacent extension platforms 311, thus ensuring the stability of the extension platform 311 during movement.

[0051] For example, connector 312 is a hinge.

[0052] Further, see Figure 3 The topmost extension platform 311 includes a mounting frame 3111 and a support plate 3112 detachably connected to the mounting frame 3111. When multiple extension platforms 311 are switched from the first position to the second position, if the pipeline in the rear equipment compartment will conflict with the position of the next extension platform 311 to be extended, the staff can remove the support plate 3112 of the topmost extension platform 311 and switch the topmost extension platform 311 to the second position so that the pipeline can pass through the topmost extension platform 311, avoiding damage to the structure of the rear equipment compartment by the extension platform 311 and ensuring the safety of the maintenance process.

[0053] For example, the mounting bracket 3111 is provided with a socket, and the support plate 3112 is provided with a pin. The pin can be inserted into or detached from the socket to realize the connection and separation of the mounting bracket 3111 and the support plate 3112.

[0054] In this embodiment, see Figure 3 The top-level extension platform 311 is equipped with a limiting post 313, and the second operating platform 32 is equipped with a limiting hole 321. When in the retraction position, the limiting post 313 can be inserted into the limiting hole 321, ensuring that the second operating platform 32 does not move while stacked with the first operating platform 31. This guarantees the stability of the second operating platform 32 placed on the first operating platform 31 during the retraction position and prevents the second operating platform 32 from moving when the extension platform 311 switches from the first position to the second position, thus avoiding damage to components in the rear equipment compartment. When the second operating platform 32 switches from the retraction position to the working position, the limiting post 313 can be disengaged from the limiting hole 321, making the operation convenient and quick.

[0055] In an optional embodiment, see [link to relevant documentation] Figure 3 and Figure 4The first operating platform 31 has a slot 3113 on its side wall along the second direction, and the second operating platform 32 has a block 322 on its side wall along the second direction. In the working position, the block 322 is engaged in the slot 3113, so that the second operating platform 32 can be quickly connected to the first operating platform 31, improving the connection efficiency. The working platform 3 also includes a fastener 33. In the working position, the fastener 33 passes through the second operating platform 32 and is fastened to the first operating platform 31. The fastener 33 cooperates with the block 322 to improve the connection strength between the second operating platform 32 and the first operating platform 31 in the working position, providing double protection for the connection between the second operating platform 32 and the first operating platform 31, and ensuring the safety of the staff when performing maintenance on the second operating platform 32. When the second operating platform 32 switches from the working position to the recovery position, the fastener 33 is first separated from the second operating platform 32 and the first operating platform 31, and then the card block 322 is taken out from the card slot 3113. The operation is convenient and quick, realizing the rapid construction of the second operating platform 32 in the rear equipment compartment.

[0056] Specifically, see Figure 1 , Figure 3 and Figure 4 The slot 3113 is located on the lowest extension platform 311. Compared to the other extension platforms 311, the lowest extension platform 311 is connected to the lifting mechanism 2. The lowest extension platform 311 is not a cantilever structure, so it has greater rigidity and can withstand greater loads. Therefore, after the second operating platform 32 is connected to the lowest extension platform 311, the lowest extension platform 311 will not deform, ensuring the safety of the workers operating on the second operating platform 32.

[0057] For example, fastener 33 is a bolt or screw.

[0058] In other embodiments, each extension platform 311 is provided with a slot 3113, and the second operating platform 32 can switch its position in the rear equipment compartment along the first direction according to the position of the component to be repaired, further expanding the range of movement of the staff in the rear equipment compartment.

[0059] In another alternative embodiment, in the working position, the second operating platform 32 is connected to the first operating platform 31 only through the card slot 3113 and the card block 322.

[0060] In another alternative embodiment, in the working position, the second operating platform 32 is connected to the first operating platform 31 only by fasteners 33.

[0061] Optionally, see Figure 1 and 5The lifting mechanism 2 includes multiple lifting components 21 connected vertically, with any two adjacent lifting components 21 slidably connected. The uppermost lifting component 21 is connected to the first operating platform 31, and the lowermost lifting component 21 is slidably connected to the base 1. When two adjacent lifting components 21 slide relative to each other, the vertical extension length of the lifting mechanism 2 can change, thereby moving the first operating platform 31 to the hatch of the rear equipment compartment. The lowermost lifting component 21 is slidably connected to the base 1, making the vertical position of the lifting mechanism 2 on the base 1 adjustable to further adjust the vertical position of the first operating platform 31.

[0062] In this embodiment, see Figure 2 , Figure 5 and Figure 6 The lifting assembly 21 includes an annular bracket 211, which is movably fitted onto the annular bracket 211 of the adjacent lifting assembly 21 in the vertical direction. When the working ladder is no longer in use, the annular bracket 211 of the upper lifting assembly 21 can be retracted into the cavity of the annular bracket 211 of the lower lifting assembly 21, or the annular bracket 211 of the lower lifting assembly 21 can be retracted into the cavity of the annular bracket 211 of the upper lifting assembly 21, reducing the space occupied by the working ladder when not in use and facilitating the storage of the working ladder. The annular bracket 211 is provided with a first pulley 212 and a first guide groove 213 extending in the vertical direction. The first pulley 212 is rotatably disposed in the first guide groove 213 of the adjacent annular bracket 211. When the first pulley 212 rolls, it moves along the extension direction of the corresponding first guide groove 213, thereby causing the lifting assembly 21 to slide relative to the adjacent lifting assembly 21. During the movement of the first pulley 212, the first guide groove 213 can restrict the movement direction of the first pulley 212, so that the lifting assembly 21 can only slide vertically relative to the adjacent lifting assembly 21. The annular bracket 211 is provided with a first sliding groove 214 and a first slider 215. The first sliding groove 214 extends vertically, and the first slider 215 is embedded in the first sliding groove 214 of the adjacent annular bracket 211 and slides in cooperation with the corresponding first sliding groove 214 to realize the sliding connection between the two adjacent sets of lifting assemblies 21. This configuration allows the first slider 215, the first slide groove 214, the first pulley 212, and the first guide groove 213 to all drive the lifting assembly 21 to slide relative to the adjacent lifting assembly 21, providing dual guidance for the movement of the lifting assembly 21, reducing the degree of swaying during the movement of the lifting assembly 21, and improving the stability of the vertical movement of the lifting assembly 21.

[0063] Specifically, see Figure 2 , Figure 5 and Figure 6The cross-sectional shape of the ring support 211 is a rectangular ring. The upper ring support 211 is located in the inner cavity of the lower ring support 211. When the working ladder is no longer in use, all lifting components 21 except the bottom lifting component 21 are retracted into the inner cavity of the bottom ring support 211. One of the first slider 215 and the first slide groove 214 is disposed on the outer side wall of the annular bracket 211 along the first direction, and the other of the first slider 215 and the first slide groove 214 is disposed on the inner side wall of the annular bracket 211 along the first direction, so that the two annular brackets 211 can slide relative to each other; the annular bracket 211 is provided with a first pulley 212 and a first guide groove 213 on both sides along the second direction, and the first pulley 212 and the first guide groove 213 on both sides are symmetrically arranged. The first pulley 212 is installed on the outer side wall of the annular bracket 211, and the first guide groove 213 is disposed on the inner side wall of the annular bracket 211, so that the lifting component 21 can be subjected to force evenly and stably during the movement, ensuring the safety of the movement of the lifting component 21.

[0064] For example, see Figure 1 The lifting assembly 21 is provided with three sets.

[0065] In other embodiments, adjacent sets of lifting components 21 are slidably connected only by the first pulley 212 and the first guide groove 213.

[0066] In other embodiments, adjacent sets of lifting components 21 are slidably connected only by the first slide groove 214 and the first slider 215.

[0067] Further, see Figure 7 and Figure 8 The base 1 is provided with a storage slot 11, and the lowest ring bracket 211 is movably installed in the storage slot 11 in the vertical direction. This allows the lowest lifting component 21 to be stored in the storage slot 11 when the work ladder is not in use, further reducing the space occupied by the work ladder. For details, please refer to... Figure 1 , Figure 7 and Figure 8 A second pulley 216 is provided on one of the groove wall of the storage groove 11 and the bottom ring bracket 211, and a second guide groove 12 is provided on the other of the groove wall of the storage groove 11 and the bottom ring bracket 211. The second pulley 216 is rotatably disposed in the second guide groove 12. A second slider 13 is provided on one of the groove wall of the storage groove 11 and the bottom ring bracket 211, and a second sliding groove 217 is provided on the other of the groove wall of the storage groove 11 and the bottom ring bracket 211. The second slider 13 is embedded in the second sliding groove 217 and slides in cooperation with the second sliding groove 217 to realize the sliding connection between the lifting mechanism 2 and the base 1.

[0068] For example, the annular support 211 has a rectangular cross-sectional shape, the storage groove 11 has a rectangular cross-sectional shape, one of the second slider 13 and the second slide groove 217 is disposed on the outer side wall of the lowest annular support 211 along the first direction, and the other of the second slider 13 and the second slide groove 217 is disposed on the side wall of the storage groove 11; the annular support 211 is provided with a second pulley 216 and a second guide groove 12 on both sides along the second direction, and the second pulley 216 and the second guide groove 12 on both sides are symmetrically arranged. The second pulley 216 is installed on the outer side wall of the lowest annular support 211, and the second guide groove 12 is disposed on the inner side wall of the storage groove 11, so that the lifting mechanism 2 can move stably relative to the base 1, ensuring the safety of the movement of the lifting mechanism 2.

[0069] In this embodiment, see Figure 1 and Figure 9 The working ladder for the aircraft's aft equipment compartment also includes multiple sets of locking assemblies 4. Each locking assembly 4 includes a locking bar 41 and a locking element 42. The locking bar 41 is disposed in one of any two adjacent sets of lifting assemblies 21, and the locking element 42 is positioned along the locking direction (…). Figure 1 The locking bar 41 is movably mounted on the base 1 or any other of two adjacent lifting components 21 (in the X or Y direction). Multiple locking grooves 411 are arranged continuously in the vertical direction on the locking bar 41. The locking member 42 has a locking position that engages with any locking groove 411 of the corresponding locking member 42 and a sliding position that disengages from the corresponding locking groove 411. In the sliding position, the locking member 42 disengages from the locking groove 411, allowing the locking bar 41 to move vertically with the corresponding lifting component 21. In the locking position, the locking member 42 restricts the movement of the locking bar 41, preventing any change in the position of the lifting component 21 relative to adjacent lifting components 21 or relative to the base 1, thus fixing the height of the working platform 3.

[0070] Specifically, see Figure 1 and Figure 9 The lifting assembly 21 or the base 1 is provided with a mounting base 218. The mounting base 218 has a through hole extending along the locking direction, and a limiting groove 2181 is provided on the side of the mounting base 218 away from the locking bar 41. One end of the locking member 42 has a limiting part 421, and the other end moves through the through hole and can be inserted into the locking groove 411. When it is necessary to adjust the extension length of the lifting mechanism 2, the locking member 42 is moved away from the locking bar 41, and the locking member 42 disengages from the locking groove 411, allowing the lifting assembly 21 to move. When it is necessary to fix the length of the lifting mechanism 2, the locking member 42 is moved towards the locking bar 41 until the locking member 42 is inserted into the corresponding locking groove 411. Then, the locking member 42 is rotated so that the limiting part 421 is engaged in the limiting groove 2181, thus preventing the locking member 42 from disengaging from the corresponding locking groove 411 and ensuring that the extension length of the lifting mechanism 2 does not change.

[0071] For example, the locking bar 41 is a rack, the locking groove 411 is a toothed groove on the rack, and the locking member 42 is a rack buckle.

[0072] Further, see Figure 1 and Figure 8 The lifting mechanism 2 also includes a first linear drive 22 disposed on the base 1. The output end of the first linear drive 22 is connected to the uppermost lifting assembly 21 and is used to drive the uppermost lifting assembly 21 to move vertically. When the uppermost lifting assembly 21 moves to the limit position where it can no longer slide relative to the lifting assembly 21 connected to it, the first linear drive 22 continues to drive the uppermost lifting assembly 21 to move upward. The uppermost lifting assembly 21 will drive the lifting assembly 21 connected to it to move vertically. Other lifting assemblies 21 can move vertically under the drive of the lifting assembly 21 connected to them and located above them, thereby providing power for the vertical movement of each group of lifting assemblies 21.

[0073] For example, the first linear drive 22 is a hydraulic cylinder.

[0074] Optionally, see Figure 1 , Figure 7 and Figure 10 The base 1 is provided with several second linear drive units 14. The output end of the second linear drive unit 14 is connected to the lifting mechanism 2 and is used to drive the lifting mechanism 2 to move in the vertical direction, so as to provide power for the movement of the lifting mechanism 2 relative to the base 1.

[0075] Specifically, see Figure 1 , Figure 7 and Figure 8 The base 1 is provided with two second linear drive members 14, which are symmetrically arranged along the second direction to stably drive the lifting mechanism 2 to move. The output end of the second linear drive member 14 is connected to the lowest ring bracket 211, and the lifting mechanism 2 is driven to move vertically as a whole through the lowest ring bracket 211.

[0076] For example, the second linear drive 14 is a hydraulic cylinder.

[0077] Further, see Figure 7 , Figure 8 and Figure 10 A control component 15 is provided on the base 1. The control component 15 is electrically connected to the first linear drive component 22 and the second linear drive component 14, and is used to control the opening and closing of the first linear drive component 22 and the second linear drive component 14.

[0078] Optionally, see Figure 3The first operating platform 31 is equipped with a detachable first guardrail 314, and the second operating platform 32 is equipped with a detachable second guardrail 323. When in the recovery position, the first guardrail 314 is separated from the first operating platform 31, and the second guardrail 323 is separated from the second operating platform 32 to avoid collision between the first guardrail 314 and the second guardrail 323 and the rear equipment compartment during movement, thus avoiding damage to the aircraft body. When in the working position, the first guardrail 314 is connected to the first operating platform 31, and the second guardrail 323 is connected to the second operating platform 32 to ensure the life and health of the personnel on the working platform 3 and improve the safety during the maintenance process.

[0079] For example, the first guardrail 314 and the first operation are detachably connected by bolts, as are the second guardrail 323 and the second operation platform 32.

[0080] Optionally, a toolbox 16 is provided on the base 1, which can be used to store tools or spare parts of the work ladder (such as fasteners 33, first guardrail 314 and second guardrail 323) used in the equipment compartment after maintenance, thereby improving the convenience of use for staff.

[0081] Optionally, see Figure 10 The base 1 is equipped with multiple wheels 17 at its bottom, so that the entire working ladder can be moved to the door of the rear equipment compartment, which improves the convenience for staff to move the working ladder.

[0082] The process of using the working ladder for the aft equipment compartment provided in this embodiment to inspect the aft equipment compartment while the aircraft is in a jacked-up state is as follows:

[0083] S1. Move the working ladder to directly below the rear equipment compartment door and rotate the working ladder so that the extension direction of the first operating platform 31 is parallel to the depth direction of the rear equipment compartment.

[0084] S2. Using the control unit 15 to control the second linear drive unit 14 to drive the lowest lifting assembly 21 to move upward. After the first operating platform 31 moves to the appropriate position, the locking member 42 is moved so that the locking member 42 is inserted into the locking groove 411 of the locking bar 41 of the lowest lifting assembly 21.

[0085] S3. Using the control unit 15, control the first linear drive unit 22 to drive the uppermost lifting component 21 to move upward. The uppermost lifting component 21 drives the other lifting components 21 to move vertically until the first operating platform 31 passes through the rear equipment compartment door and enters the rear equipment compartment, and moves to the required working height. Then, insert the locking component 42 on each group of lifting components 21 into the locking groove 411 of the corresponding locking strip 41.

[0086] S4. Prop each layer of extension platform 311 in the first direction in order from bottom to top, so that each layer of extension platform 311 switches from the first position to the second position; and during the switching process of each layer of extension platform 311 from the first position to the second position, determine whether the next layer of extension platform 311 to be pushed will collide with the pipeline in the rear equipment compartment. If so, separate the support plate 3112 from the mounting bracket 3111 and switch the top layer of extension platform 311 to the second position; if not, proceed directly to the next step.

[0087] S5. After the first operating platform 31 extends to the required position, the limiting post 313 is removed from the limiting hole 321, the second operating platform 32 is separated from the top extension platform 311, and the second operating platform 32 is connected to the bottom extension platform 311 using the locking block 322 and the fastener 33.

[0088] S6. Connect the first guardrail 314 to the top extension platform 311, and connect the second guardrail 323 to the second operating platform 32.

[0089] S7. After the maintenance is completed, separate the first guardrail 314 from the top extension platform 311, separate the second guardrail 323 from the second operating platform 32, and separate the second operating platform 32 from the bottom extension platform 311. Move the second operating platform 32 to the top extension platform 311 and insert the limiting post 313 into the limiting hole 321. Then, drive the multiple connecting parts 312 to rotate so that the multiple extension platforms 311 switch from the second position to the first position. Next, separate the locking part 42 from the corresponding locking strip 41, and use the first linear drive 22 and the second linear drive 14 to drive the lifting mechanism 2 to retract into the storage slot 11. Finally, store the fastener 33, the first guardrail 314 and the second guardrail 323 into the toolbox 16.

[0090] When using the working ladder for the rear equipment compartment of an aircraft provided in this embodiment to inspect the rear equipment compartment while the aircraft is in a landed state, the rest of the process is the same as that in the takeoff state, except that step S2 above does not need to be performed, and will not be described again here.

[0091] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A service ladder for an aircraft aft equipment bay, characterized by, The utility model relates to a lifting platform, including: Base (1); Lifting mechanism (2) is movably arranged in the base (1) along the vertical direction, and the extension length of the lifting mechanism (2) along the vertical direction is adjustable; Work platform (3) is arranged on the top of the lifting mechanism (2), and the work platform (3) includes first operation platform (31) and second operation platform (32), the first operation platform (31) is connected with the lifting mechanism (2), and the extension length of the first operation platform (31) along the first direction is adjustable, the second operation platform (32) has a recovery position and a working position, when the recovery position, the second operation platform (32) is stacked with the first operation platform (31), when the working position, the second operation platform (32) is located on the side of the first operation platform (31) along the second direction and is detachably connected with the first operation platform (31), and the first direction is perpendicular to the second direction.

2. A service ladder for an aircraft aft equipment bay according to claim 1, characterized in that, The first operation platform (31) includes a plurality of extension platforms (311) and a plurality of connecting pieces (312), any two adjacent extension platforms (311) are connected by the connecting piece (312), and the two ends of the connecting piece (312) are rotatably connected with the corresponding two extension platforms (311), a plurality of the extension platforms (311) have a stacked first position and a stepped second position, the corresponding two extension platforms (311) can be switched between the first position and the second position by driving the connecting piece (312) to rotate, the extension platform (311) located in the lowermost layer is connected with the lifting mechanism (2), and the second operation platform (32) is stacked on the extension platform (311) located in the uppermost layer in the recovery position.

3. A service ladder for an aircraft aft equipment bay according to claim 2, wherein, A limiting column (313) is arranged on the extension platform (311) located in the uppermost layer, a limiting hole (321) is arranged on the second operation platform (32), and the limiting column (313) can be inserted into the limiting hole (321) in the recovery position.

4. A service ladder for an aircraft aft equipment bay according to claim 1, wherein, A clamping groove (3113) is arranged on the side wall of the first operation platform (31) along the second direction, a clamping block (322) is arranged on the side wall of the second operation platform (32) along the second direction, and the clamping block (322) is clamped in the clamping groove (3113) in the working position. And / or, the work platform (3) further includes a fastener (33), and the fastener (33) passes through the second operation platform (32) and is fastened to the first operation platform (31) in the working position.

5. A service ladder for an aircraft aft equipment bay according to claim 1, wherein, The lifting mechanism (2) includes a plurality of lifting assemblies (21) connected along the vertical direction, and any two adjacent lifting assemblies (21) are slidably connected, the lifting assembly (21) located at the uppermost position is connected with the work platform (3), and the lifting assembly (21) located at the lowermost position is slidably connected with the base (1).

6. A service ladder for an aircraft aft equipment bay according to claim 5, wherein, The lifting assembly (21) comprises a ring-shaped support (211) movably sleeved in the ring-shaped support (211) of the adjacent lifting assembly (21) in the vertical direction; The ring-shaped support (211) is provided with a first pulley (212) and a first guide groove (213) extending in the vertical direction, and the first pulley (212) is rotatably arranged in the first guide groove (213) of the adjacent ring-shaped support (211); And / or, the ring-shaped support (211) is provided with a first sliding groove (214) and a first sliding block (215), the first sliding groove (214) extends in the vertical direction, and the first sliding block (215) is embedded in the first sliding groove (214) of the adjacent ring-shaped support (211) and is in sliding fit with the corresponding first sliding groove (214).

7. A service ladder for an aircraft aft equipment bay according to claim 5, wherein, The working ladder for the rear equipment compartment of the aircraft further comprises a plurality of locking assemblies (4), the locking assembly (4) comprises a locking strip (41) and a locking piece (42), the locking strip (41) is arranged in one of any two adjacent groups of the lifting assembly (21), the locking piece (42) is movably arranged in the other of the base (1) or any two adjacent groups of the lifting assembly (21) in the locking direction, the locking strip (41) is provided with a plurality of locking grooves (411) arranged in the vertical direction in series, and the locking piece (42) has a locking position of inserting into any locking groove (411) of the corresponding locking piece (42) and a sliding position of separating from the corresponding locking groove (411).

8. A service ladder for an aircraft aft equipment bay according to claim 5, wherein, The lifting mechanism (2) further comprises a first linear driving piece (22) arranged in the base (1), and an output end of the first linear driving piece (22) is connected with the uppermost lifting assembly (21) for driving the uppermost lifting assembly (21) to move in the vertical direction.

9. A service ladder for an aircraft aft equipment bay according to claim 1, wherein, The base (1) is provided with a plurality of second linear driving pieces (14), and output ends of the second linear driving pieces (14) are connected with the lifting mechanism (2) for driving the lifting mechanism (2) to move in the vertical direction.

10. A working ladder for an aircraft aft equipment bay according to any one of claims 1 to 9, characterized in that, The first operating platform (31) is provided with a detachable first guardrail (314), and the second operating platform (32) is provided with a detachable second guardrail (323), in the recovery position, the first guardrail (314) is separated from the first operating platform (31), and the second guardrail (323) is separated from the second operating platform (32), and in the working position, the first guardrail (314) is connected with the first operating platform (31), and the second guardrail (323) is connected with the second operating platform (32).

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