A guide support structure for aircraft large component replacement

Abstract

The application relates to the technical field of aircraft maintenance, and particularly discloses a guide support structure for replacing large components of an aircraft, which comprises a vehicle body, a longitudinal support seat arranged on the vehicle body and capable of moving in the horizontal direction, a linkage operation adjusting mechanism arranged on the side wall of the longitudinal support seat and used for providing two-speed variable independent transmission power to the longitudinal support seat, a lifting mechanism capable of lifting and arranged on the longitudinal support seat, a rotatable holding frame arranged on the lifting mechanism and used for fixing an aircraft landing gear in a disassembled state, and lifting power of the lifting mechanism and rotating power of the holding frame are both from the longitudinal support seat. The guide support structure has the advantages of multi-degree-of-freedom adjustment in a limited space, high positioning precision and convenient operation, and can improve the safety and efficiency of the replacement operation of large components of the aircraft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft maintenance, in particular to a guiding and supporting structure for replacing large components of an aircraft. BACKGROUND

[0002] In the process of replacing and maintaining existing large components of an aircraft, especially landing gears, a large hoisting platform or multiple single-function devices are usually needed for assistance. Such devices generally have problems such as insufficient positioning accuracy, single adjustment mode, complicated action switching, and low operation efficiency. For example, traditional supporting structures can only provide a single lifting function and lack rotation adjustment capability, resulting in insufficient operational flexibility in narrow maintenance spaces. Although some devices have rotating mechanisms, the lifting and rotating powers are highly coupled, which can cause action interference, making the maintenance action clumsy and time-consuming, requiring multiple people to cooperate, and being prone to collision. Therefore, it is difficult to meet the coordinated needs of quick lifting and multi-angle rotation of landing gears in complex maintenance environments. In addition, mobile positioning and operation switching still rely on manual multi-step adjustment, which is inefficient and prone to misoperation. Therefore, there is an urgent need for a guiding and supporting structure that can realize multi-degree-of-freedom adjustment in limited space while considering high positioning accuracy and operational convenience, to improve the safety and efficiency of replacing large components of an aircraft. SUMMARY

[0003] The embodiments of the present application provide a guiding and supporting structure for replacing large components of an aircraft, mainly aiming to realize a guiding and supporting structure that can realize multi-degree-of-freedom adjustment in limited space while considering high positioning accuracy and operational convenience, to improve the safety and efficiency of replacing large components of an aircraft.

[0004] To achieve the above-mentioned purpose, the guiding and supporting structure for replacing large components of an aircraft according to an embodiment of the present application comprises:

[0005] a vehicle body;

[0006] a longitudinal supporting seat arranged on the vehicle body;

[0007] a linkage operation adjustment mechanism arranged on the side wall of the longitudinal supporting seat, used to provide two kinds of speed-variable independent transmission power to the longitudinal supporting seat;

[0008] a lifting mechanism capable of lifting and moving, sleeved on the longitudinal supporting seat, a retaining frame capable of rotating is further arranged on the lifting mechanism, the retaining frame is used to fix the landing gear in a disassembled state, and the lifting power of the lifting mechanism and the rotating power of the retaining frame are both from the longitudinal supporting seat.

[0009] In an available embodiment, the vehicle body is further provided with a traction mechanism, and an opening is arranged on the outer end of the traction mechanism, which is used for hand holding or connecting with a powered vehicle; a steering mechanism is further arranged on the connecting end of the traction mechanism, and the steering mechanism is in transmission connection with the rotation control component of the steering wheel at the bottom end of the vehicle body.

[0010] In an available embodiment, the longitudinal support seat comprises a seat body with a height higher than the holding frame, two lead screws are arranged in the seat body and located on both sides of the seat body in the horizontal direction, and the two end portions of the lifting mechanism are screwed and sleeved on the two lead screws; a first polygonal shaft is further arranged in the seat body and located between the two lead screws, and the middle portion of the lifting mechanism is in transmission connection with the first polygonal shaft, wherein the two lead screws and the first polygonal shaft are all in transmission connection with the linkage operation adjusting mechanism.

[0011] In an available embodiment, the linkage operation adjusting mechanism comprises an operation box arranged on the upper end side wall of the longitudinal support seat, and the linkage operation adjusting mechanism further comprises: a first driving shaft arranged in the operation box in a vertical state; a second driving shaft arranged in the operation box on the opposite side of the first driving shaft and spaced apart from the first driving shaft; an operation main shaft rotatably arranged between the first driving shaft and the second driving shaft, the operation main shaft is in an inclined state, the top end extends to the outside of the operation box, and a rotating disc is connected to the top end; a transmission control mechanism movably arranged on the side wall of the operation box; the transmission control mechanism is connected to the operation main shaft, and is used for realizing the lifting action and / or the rotation action of the holding frame by changing the contact position and / or the contact state of the operation main shaft with the first driving shaft and the second driving shaft.

[0012] In an available embodiment, the lifting mechanism comprises: the lifting seat movably arranged on the longitudinal support seat, the two end portions of the lifting seat are screwed and sleeved on the two lead screws; a protection box fixedly arranged on the top end face of the lifting seat; a power input rod rotatably arranged in the protection box, the end portion of the power input rod is in transmission connection with the first polygonal shaft; a worm fixedly arranged on the power input rod; a worm wheel arranged in the inner cavity of the protection box through a rotating shaft body and in meshing connection with the worm; a gear coaxially arranged with the worm wheel and used for synchronous rotation with the worm wheel; two rack rods movably arranged in the inner cavity of the protection box and capable of extending and retracting towards the holding frame, the outer end of the rack rod is in rotation connection with a sliding seat, the sliding seat is in linear sliding connection with the outer wall of the holding frame, and the inner side walls of the two rack rods are respectively in meshing connection with the upper and lower ends of the gear; a hinge seat fixedly arranged on the outer wall of the protection box and located between the two rack rods, and the holding frame is in rotation connection with the hinge seat.

[0013] In an embodiment, the first driving shaft is provided with a first conical friction roller, the second driving shaft is provided with a second conical friction roller, the top end of the second driving shaft is provided with two sets of second transmission assemblies, the other end of the second transmission assembly is connected to the lead screw, the bottom end of the first driving shaft is provided with a first transmission assembly, the other end of the first transmission assembly is connected to the first polygonal shaft; wherein the projection outline edge of the first conical friction roller and the second conical friction roller is in parallel state.

[0014] In an embodiment, the operation spindle comprises: a second polygonal shaft rotatably arranged on the top end surface of the operation box and connected to the rotating disc; a movable shaft sleeve movably arranged outside the bottom end of the second polygonal shaft; an inflatable friction wheel fixedly arranged at the top end of the movable shaft sleeve and capable of contacting the first conical friction roller and / or the second conical friction roller; and a central sealed air inlet fixedly arranged at the bottom end of the movable shaft sleeve and connected to the inflatable friction wheel for receiving gas input by the transmission control mechanism.

[0015] In an embodiment, the transmission control mechanism comprises: the sliding block movably arranged on the outer wall of the operation box along the axis direction of the operation spindle; an air cylinder fixedly arranged on the sliding block, the air cylinder further comprising a piston and a piston rod connected to the piston; a handle fixedly arranged outside the sliding block, the handle further comprising a groove; a pressing plate rotatably arranged in the groove by a torsion spring, the bottom end of the pressing plate being provided with a rotatable inclined rod connected to the outer end of the piston rod; a connecting rod having one end connected to the air cylinder and the other end rotatably arranged on the movable shaft sleeve through a bearing rotating seat; and an air path pipeline having one end connected to the output end of the air cylinder and the other end connected to the central sealed air inlet.

[0016] In an embodiment, the power input rod is further provided with: an extension seat fixedly arranged on the outer wall of the protection box and non-contactingly arranged outside the outer wall of the first polygonal shaft; the first bevel gear is provided with a polygonal hole in the center, the polygonal hole being slidably arranged outside the first polygonal shaft; and a second bevel gear fixedly arranged on the power input rod and engaged with the first bevel gear.

[0017] The application provides a guide support structure for aircraft large component replacement, which realizes spatial decoupling and flexible switching of vertical lifting and multi-angle rotation through nested and composite transmission design of a vehicle body, a longitudinal support seat, a lifting mechanism, a retaining frame and a linkage operation adjusting mechanism, can complete double-mode power distribution under a single operation source, supports independent control of an aircraft landing gear and realizes collaborative operation of different transmission ratio control speeds of lifting and rotation, thereby improving operation efficiency according to actual operation requirements in a narrow space, improving adaptability to different maintenance spaces and landing gear positions, and improving transmission efficiency and switching precision and reducing wear and misoperation risks through independent transmission paths of a lead screw and a polygonal shaft, switching control of a conical friction roller and an inflatable friction wheel and a pneumatic anti-misoperation structure. In conclusion, the application has compact structure, reasonable action decoupling and convenient and efficient operation, and is particularly suitable for quick and safe replacement operation of aircraft landing gears and other large components. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure schematic view of a first angle of the guide support structure for aircraft large component replacement provided by the embodiment of the application is shown;

[0019] Figure 2 A structure schematic view of a second angle of the guide support structure for aircraft large component replacement provided by the embodiment of the application is shown;

[0020] Figure 3 A side view structure schematic view of the guide support structure for aircraft large component replacement provided by the embodiment of the application is shown;

[0021] Figure 4 A local enlarged view of A in Figure 3 is shown;

[0022] Figure 5 A structure schematic view of the retaining frame provided by the embodiment of the application is shown;

[0023] Figure 6 A structure enlarged view of B in Figure 5 is shown;

[0024] Figure 7 A structure schematic view of C in Figure 5 is shown;

[0025] Figure 8 A structure schematic view of the longitudinal support seat provided by the embodiment of the application is shown;

[0026] Figure 9 A structure schematic view of the linkage operation adjusting mechanism provided by the embodiment of the application is shown;

[0027] Figure 10 An enlarged view of the structure at D in Figure 9 An enlarged view of the structure at D in

[0028] Figure 11 An enlarged view of the structure at D in

[0029] Figure 12 An enlarged view of the structure at D in

[0030] In the figure: 10, vehicle body, 20, steering mechanism, 30, traction mechanism, 60, longitudinal support seat, 70, linkage operation adjusting mechanism, 80, lifting mechanism, 90, retainer, 11, lifting ring, 61, screw rod, 62, first polygonal shaft, 71, first drive shaft, 72, second drive shaft, 73, operation main shaft, 74, transmission control mechanism, 75, rotating disc, 76, stopper, 81, lifting seat, 82, protection box, 83, power input rod, 84, worm, 85, worm gear, 86, gear, 87, rack rod, 88, sliding seat, 89, hinge seat, 91, set, 92, fixed seat, 711, first conical friction roller, 712, first transmission assembly, 721, second conical friction roller, 722, second transmission assembly, 731, second polygonal shaft, 732, movable shaft sleeve, 733, inflatable friction wheel, 734, center sealed air inlet end, 741, sliding block, 742, air cylinder, 743, handle, 744, pressing plate, 745, inclined rod, 746, piston rod, 747, connecting rod, 748, bearing rotating seat, 749, air path pipeline, 831, extension seat, 832, first helical gear, 833, second helical gear. DETAILED DESCRIPTION

[0031] In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present specification, and are not limitations of the technical solutions of the present specification. In the case of no conflict, the technical features in the embodiments of the present specification and the embodiments can be combined with each other.

[0032] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily implying any actual relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. The terms "two or more" include two or more.

[0033] Referring to Figures 1 to 12 As shown in the drawings, the embodiment of the present application provides a guiding support structure for replacing large components of an aircraft, which comprises a vehicle body 10, a longitudinal support base 60 and a lifting mechanism 80. Specifically, the longitudinal support base 60 is arranged on the vehicle body 10, and a linkage operation adjusting mechanism 70 is arranged on the side wall of the longitudinal support base 60 to provide two-speed variable independent transmission power to the longitudinal support base 60. The lifting mechanism 80, which can be lifted and lowered, is sleeved on the longitudinal support base 60, and a rotatable holder 90 is further arranged on the lifting mechanism 80 to fix the aircraft landing gear in a disassembled state. The lifting power of the lifting mechanism 80 and the rotating power of the holder 90 are respectively from the longitudinal support base 60.

[0034] The application provides a device for replacing large components of an aircraft, in particular a guide support structure of an aircraft landing gear, in particular by a vehicle body 10 as a mobile carrier, a linkage operation adjusting mechanism 70 providing double mode power output, and a lifting mechanism 80 and a holding frame 90 forming a composite adjusting structure. The holding frame 90 can effectively avoid the collision between the landing gear and the vehicle body 10, and the horizontal multi-directional movement capability of the longitudinal support base 60 enables the holding frame 90 to have a preliminary positioning function and be flexibly moved to a required working position. The linkage operation adjusting mechanism 70 is designed by adjusting / switching two independent transmission powers, so that a single operation source can control the transmission ratio of lifting and rotating actions. The lifting mechanism 80 is sleeved on the longitudinal support base 60, which inherits the positioning accuracy of the longitudinal support base 60 and realizes the separated transmission of lifting and rotating powers through the double transmission paths of the lead screw 61 and the polygonal shaft. The holding frame 90 directly bears the landing gear, and the rotating power is derived from the internal transmission structure of the longitudinal support base 60, forming the mechanical linkage of lifting and rotating actions. Therefore, the nested design of the longitudinal support base 60 and the lifting mechanism 80 realizes the spatial decoupling of vertical lifting and horizontal rotating, and the power distribution of the linkage operation adjusting mechanism 70 ensures that the two adjusting actions can be independently controlled and cooperatively operated, efficiently dealing with the disassembly and assembly work of the holding frame 90 which needs to be quickly and complexly maintained.

[0035] As shown in Figures 1 to 3 , in some examples, further, the vehicle body 10 is further provided with a traction mechanism 30, the outer end of the traction mechanism 30 is provided with an opening for hand holding or connecting with a powered vehicle; the connecting end of the traction mechanism 30 is further provided with a steering mechanism 20, which is in transmission connection with the rotating control component of the steering wheel at the bottom end of the vehicle body 10.

[0036] In the present example, the combination of the traction mechanism 30 and the steering mechanism 20 realizes the flexible movement and positioning of the device in the maintenance site. The opening provided at the outer end of the traction mechanism 30 allows the operator to directly hold the traction or connect with a powered vehicle, which not only retains the flexibility of manual operation, but also supports the efficient movement of mechanical traction. The steering mechanism 20 provided at the connecting end of the traction mechanism 30 and the vehicle body 10 directly drives the steering wheel at the bottom end of the vehicle body 10 through the transmission control component, so that the steering action is linked with the traction operation, avoiding the cumbersome process of separately adjusting the steering of the traditional device. The transmission connection design of the steering wheel rotating control component directly converts the operation instruction into mechanical movement, reduces the intermediate transmission error, and thus improves the steering accuracy and response speed of the device in the narrow maintenance space.

[0037] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 ,Figure 8 、 Figure 9 and Figure 11 Further, in some examples, the longitudinal support base 60 includes a seat body with a height higher than the holder 90, two lead screws 61 are arranged in the seat body and located on both sides of the seat body in the horizontal direction, and the two end portions of the lifting mechanism 80 are threadedly sleeved on the two lead screws 61; the seat body is further provided with a first polygonal shaft 62 located between the two lead screws 61, and the middle portion of the lifting mechanism 80 is drivingly connected to the first polygonal shaft 62, wherein the two lead screws 61 and the first polygonal shaft 62 are respectively drivingly connected to the linkage operation adjustment mechanism 70.

[0038] In the present example, the longitudinal support base 60 is used to control the double action of the landing gear. Specifically, the design of the seat body with a height higher than the holder 90 provides sufficient vertical movement space for the lifting mechanism 80, avoiding interference between the holder 90 and the seat body during lifting. The two symmetrically distributed lead screws 61 are threadedly connected to the end portions of the lifting mechanism 80, forming a double-point synchronous driving structure to ensure the stability and load balance of the lifting action. The first polygonal shaft 62 located between the lead screws 61 transmits rotary power to the middle portion of the lifting mechanism 80 through a non-circular cross-section transmission method, effectively solving the problem of fixed transmission position in traditional transmission shafts. When the first polygonal shaft 62 is used, the lifting mechanism 80 can receive power from the first polygonal shaft 62 at any height, without affecting the lifting function of the lifting mechanism 80. The connection of the lead screws 61 and the first polygonal shaft 62 to the linkage operation adjustment mechanism 70 allows independent control of the lifting power of the lifting mechanism 80 and the rotating power of the holder 90. The operator can select to drive the lead screws 61 to lift the holder 90 or drive the first polygonal shaft 62 to rotate the holder 90 through a single linkage operation adjustment mechanism 70. In addition, the operator can simultaneously achieve the lifting and rotation of the holder 90, which can achieve different control speeds, such as achieving the rapid descent of the holder 90 while slowly rotating the holder 90, or slowly descending the holder 90 while rapidly rotating the holder 90. A single person can quickly switch and adjust the two action modes according to the actual maintenance needs in a limited space. This not only ensures the mechanical decoupling of lifting and rotating actions, but also optimizes the overall size of the equipment through the arrangement of space-saving transmission components, adapting to the narrow operating environment in the single-person aircraft maintenance scene.

[0039] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, in some examples, further, the linkage operation adjustment mechanism 70 includes an operation box located on the upper end side wall of the longitudinal support base 60, and further includes a first drive shaft 71, a second drive shaft 72, an operation main shaft 73, and a transmission control mechanism 74. The first drive shaft 71 is vertically arranged in the operation box. The second drive shaft 72 is vertically arranged in the operation box on the opposite side of the first drive shaft 71 and is arranged in a spaced-apart manner with the first drive shaft 71. The operation main shaft 73 is rotatably arranged between the first drive shaft 71 and the second drive shaft 72, is arranged in an inclined state, and has a top end extending to the outside of the operation box and connected with a rotating disc 75. The transmission control mechanism 74 is movably arranged on the side wall of the operation box. The transmission control mechanism 74 is connected with the operation main shaft 73 and is used to realize the lifting action and / or the rotating action of the retainer 90 by changing the contact position and / or the contact state of the operation main shaft 73 with the first drive shaft 71 and the second drive shaft 72.

[0040] In the present example, the switching control of the single operation source to the two transmission paths is realized by the definition of the contact relationship between the operation main shaft 73 and the double drive shafts. The operation box is arranged on the upper end side wall of the longitudinal support base 60, and the rotating disc 75 is slightly inclined, which is suitable for the driving environment of the double drive shafts and is also convenient for the operator to control the rotating disc 75 with one hand. The first drive shaft 71 and the second drive shaft 72 are arranged in a vertically spaced-apart manner, forming two independent power output ends, which correspond to the lifting and rotating driving requirements of the lifting mechanism 80 and the retainer 90, respectively. The inclined operation main shaft 73 receives external rotating force through the rotating disc 75, and the axis inclined design is ergonomic and convenient for the operator to apply force. The transmission control mechanism 74 changes the contact state or the contact position of the operation main shaft 73 with the two drive shafts, so that the operation main shaft 73 can selectively form a friction transmission with the first drive shaft 71 (driving lifting) or the second drive shaft 72 (driving rotation), thereby realizing the switching or transmission ratio adjustment of the two action modes. The complex switching steps required by the traditional multi-shaft independent operation are avoided, and by dynamically adjusting the friction contact state, the operator only needs to adjust the transmission control mechanism 74 to realize the coupling or decoupling of the lifting and rotating functions, which significantly improves the operation efficiency and the action switching accuracy.

[0041] As shown in FIG. 1, the linkage operation adjustment mechanism 70 includes an operation box 710, a first drive shaft 720, a second drive shaft 730, an operation main shaft 740, and a transmission control mechanism 750. The operation box 710 is arranged on the upper end side wall of the longitudinal support base 60. The first drive shaft 720 is vertically arranged in the operation box 710. The second drive shaft 730 is vertically arranged in the operation box 710 on the opposite side of the first drive shaft 720 and is arranged in a spaced-apart manner with the first drive shaft 720. The operation main shaft 740 is rotatably arranged between the first drive shaft 720 and the second drive shaft 730, is arranged in an inclined state, and has a top end extending to the outside of the operation box 710 and connected with a rotating disc 750. The transmission control mechanism 750 is movably arranged on the side wall of the operation box 710. The transmission control mechanism 750 is connected with the operation main shaft 740 and is used to realize the lifting action and / or the rotating action of the retainer 90 by changing the contact position and / or the contact state of the operation main shaft 740 with the first drive shaft 720 and the second drive shaft 730. Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in some examples, further, the lifting mechanism 80 comprises: a lifting seat 81, a protection box 82, a power input rod 83, a worm 84, a worm wheel 85, a gear 86, two rack rods 87 and a hinge base 89, the lifting seat 81 is arranged on the longitudinal support base 60 in a lifting manner, and both ends of the lifting seat 81 are screwed on the two lead screws 61; the protection box 82 is fixedly arranged on the top end face of the lifting seat 81; the power input rod 83 is rotatably arranged in the protection box 82, and the end of the power input rod 83 is in transmission connection with the first polygonal shaft 62; the worm 84 is fixedly arranged on the power input rod 83; the worm wheel 85 is arranged in the inner cavity of the protection box 82 through a rotating shaft body and is in meshing connection with the worm 84; the gear 86 is coaxially arranged with the worm wheel 85 and is used for synchronous rotation with the worm wheel 85; the two rack rods 87 are arranged in the inner cavity of the protection box 82 in a telescopic manner towards the retainer 90, the outer end of the rack rod 87 is movably connected to the outer wall of the retainer 90 through the sliding seat 88, and the inner side walls of the two rack rods 87 are respectively meshed in the upper and lower ends of the gear 86; the hinge base 89 is fixedly arranged on the outer wall of the protection box 82 and is located between the two rack rods 87, and the retainer 90 is rotatably connected to the hinge base 89.

[0042] In the present example, the vertical lifting of the retainer 90 is realized through the screwing cooperation of the lifting seat 81 and the lead screw 61, and the inclination angle of the retainer 90 is controlled by using the composite transmission structure of the worm wheel 85, the worm 84 and the gear 86 and the rack. The design that the lifting seat 81 is sleeved with the lead screw 61 at both ends guarantees the synchronization and stability of the lifting action, and the protection box 82 provides sealing protection for the transmission components. The transmission connection of the power input rod 83 and the first polygonal shaft 62 ensures the reliability of power transmission, the speed reduction mechanism formed by the meshing of the worm 84 and the worm wheel 85 has the self-locking characteristic and can prevent the retainer 90 from rotating by itself due to gravity. The meshing design of the gear 86 and the upper and lower two groups of rack rods 87 converts the rotary motion of the worm wheel 85 into the symmetrical telescopic action of the rack rods 87, and drives the retainer 90 to rotate around the hinge base 89 through the sliding seat 88. The hinge base 89, as a rotating fulcrum, is combined with the telescopic guide of the rack rod 87, which not only realizes the accurate control of the inclination angle of the retainer 90, but also avoids the jamming problem caused by unilateral force. The structure realizes the double-freedom adjustment of the vertical lifting and the pitching rotation of the retainer 90 in a single lifting mechanism 80 through the integrated design of the mechanical transmission chain.

[0043] As Figure 9 and Figure 11As shown, in some examples, further, a first conical friction roller 711 is provided on the first drive shaft 71, a second conical friction roller 721 is provided on the second drive shaft 72, two sets of second transmission components 722 are provided at the top of the second drive shaft 72, the other end of the second transmission components 722 is connected to the lead screw 61, and a first transmission component 712 is provided at the bottom of the first drive shaft 71, the other end of the first transmission component 712 is connected to the first polygonal shaft 62; wherein, the projected contour lines of the first conical friction roller 711 and the second conical friction roller 721 are parallel.

[0044] In this example, the layout of the double conical friction rollers forms a transmission mechanism that converts a single power source into two transmission paths, enabling precise control of two actions by a single operating spindle 73. Specifically, the parallel design of the projected contours of the first conical friction roller 711 and the second conical friction roller 721 ensures that the operating spindle 73 maintains stable contact with the two friction rollers during axial movement. The staggered arrangement of the top and bottom surfaces forms an asymmetrical contact area, allowing the operating spindle 73 to selectively contact different areas of the first conical friction roller 711 or the second conical friction roller 721, or contact only a single conical friction roller, when rotating at an angle. This enables the individual lifting or rotating function of the cage 90, thereby triggering the rotation of the lifting mechanism 80 or the cage 90 respectively. The second transmission assembly 722 transmits power to the lifting mechanism 80 via the lead screw 61 to achieve the lifting and lowering action of the cage 90. The first transmission assembly 712 transmits power to the lifting mechanism 80 via the first polygonal shaft 62, which can also achieve the rotation of the cage 90. The branch transmission arrangement makes the power transmission paths of the two actions independent of each other. The staggered layout of the two sets of conical friction rollers, combined with the tilt angle of the operating spindle 73, can achieve smooth switching of power output during operation, and can also realize the independent lifting or rotation function of the cage 90.

[0045] like Figure 11 and Figure 12 As shown, in some examples, the operating spindle 73 further includes: a second polygonal shaft 731, a movable bushing 732, an inflatable friction wheel 733, and a centrally sealed air inlet 734. The second polygonal shaft 731 is rotatably mounted on the top surface of the operating box and connected to the turntable 75. The movable bushing 732 is linearly movable and sleeved on the outer side of the bottom end of the second polygonal shaft 731. The inflatable friction wheel 733 is fixedly mounted on the top end of the movable bushing 732 and can contact the first conical friction roller 711 and / or the second conical friction roller 721. The centrally sealed air inlet 734 is fixedly mounted on the bottom end of the movable bushing 732 and communicates with the inflatable friction wheel 733 for receiving gas input from the transmission control mechanism 74.

[0046] In this example, the single operating spindle 73 realizes the switching control of the two transmission modes through the contact cooperation of the axially movable inflatable friction wheel 733 with the conical friction roller. The rigid connection of the second polygonal shaft 731 with the turntable 75 ensures the effective transmission of the operating torque, and the linear movement function of the movable shaft sleeve 732 enables the inflatable friction wheel 733 to displace axially along the second polygonal shaft 731, thereby changing the contact area with the first conical friction roller 711 and the second conical friction roller 721, so as to realize the different transmission ratios of the first drive shaft 71 and the second drive shaft 72 driven by the rotary power of the turntable 75, corresponding to realize the different adjustment speeds of the lifting and rotating actions of the retainer 90. Among them, the innovative design of the inflatable friction wheel 733 adjusting the contact pressure through air pressure can increase the air pressure to enhance the friction contact force when power transmission is needed, and can reduce the air pressure to reduce wear in the idle state, which helps to realize the low-resistance movement of the slider 741, so as to quickly adjust the transmission ratio of the first drive shaft 71 and the second drive shaft 72, and also helps to realize the anti-mis-touch mode. When the retainer 90 is in a fixed position, the worker may need to observe the position state of the landing gear in time, so he may leave the turntable 75 and the handle 743. When the worker leaves the turntable 75 and the handle 743, the inflatable friction wheel 733 automatically reduces the volume and releases the contact state with the first conical friction roller 711 and the second conical friction roller 721, realizing the anti-mis-touch effect and ensuring the operation safety, further reducing the possibility of landing gear mis-touch. The center sealed air inlet end 734 adopts an axial sealing structure, and the friction wheel working state is controlled by the air cylinder 742 air source input at the slider 741. Therefore, this example combines mechanical transmission with air pressure control, not only retains the stepless speed regulation advantage of friction transmission, but also solves the defects of traditional friction transmission such as easy slipping and fast wear through air pressure regulation, and can also realize the high safety anti-mis-touch effect.

[0047] As Figure 12As shown, in some examples, the transmission control mechanism 74 further includes: a slider 741, an air cylinder 742, a handle 743, a pressure plate 744, a connecting rod 747, and an air passage 749. The slider 741 is movable along the axis of the operating spindle 73 and is snapped onto the outer wall of the operating box. The air cylinder 742 is fixedly mounted on the slider 741, and a piston and a piston rod 746 connected to the piston are also provided inside the air cylinder 742. The handle 743 is fixedly mounted on the outside of the air cylinder 742, and a groove is provided on the handle 743. The pressure plate 744 is connected by a torsion spring. The pressure plate 744 is rotatably mounted in the groove. A rotatable tilting rod 745 is provided at the bottom of the pressure plate 744. The tilting rod 745 is connected to the outer end of the piston rod 746. One end of the connecting rod 747 is connected to the air cylinder 742, and the other end is rotatably mounted on the movable bushing 732 via the bearing rotating seat 748. The bearing rotating seat 748 has a built-in labyrinth seal bearing. One end of the air passage pipe 749 is connected to the output end of the air cylinder 742, and the other end is connected to the central sealing air inlet 734. The central sealing air inlet 734 is the bottom center hole of the labyrinth seal bearing.

[0048] In this example, the pneumatically controlled handle 743 is used to adjust the transmission ratio of the first drive shaft 71 and the second drive shaft 72, achieving low wear in a single drive shaft transmission. The slider 741 moves along the axis of the operating spindle 73, allowing the operator to flexibly adjust the transmission ratio of the first drive shaft 71 and the second drive shaft 72 by adjusting the position of the transmission control mechanism 74, adapting to the displacement requirements of different cages 90 in three-dimensional space. The air cylinder 742 and the piston rod 746 work together to form a pneumatic pressure adjustment mechanism. The pressure plate 744 on the handle 743 triggers the tilting rod 745 to push the piston, converting manual pressing into a change in gas pressure, which increases the volume of the inflatable friction wheel 733, increasing the friction with the first conical friction roller 711 and the second conical friction roller 721. The pressure plate 744 is reset by a torsion spring, ensuring automatic return to its original position after operation, preventing accidental activation, and automatically disengaging the transmission relationship of the inflatable friction wheel 733 after the operator releases their grip. This significantly improves operational convenience and safety.

[0049] like Figure 7 As shown, in some examples, the power input rod 83 is further provided with: an extension seat 831, a first helical gear 832, and a second helical gear 833. The extension seat 831 is fixedly mounted on the outer wall of the protective box 82 and is not in contact with the outer side of the outer wall of the first polygonal shaft 62. The first helical gear 832 is rotatably mounted in the extension seat 831. The first helical gear 832 has a polygonal hole in its center and can slide on the outer side of the first polygonal shaft 62 through the polygonal hole. The second helical gear 833 is fixedly mounted on the power input rod 83 and meshes with the first helical gear 832.

[0050] In the present example, the extension seat 831 is a fixed support structure, which is synchronous with the protection box 82, and the non-contact sleeve set ensures that the first polygonal shaft 62 can rotate freely inside it. The first helical gear 832 adopts a polygonal hole sliding sleeve connection, which combines the axial sliding freedom with the circumferential torque transmission function, so that when the lifting mechanism 80 moves up and down, the first helical gear 832 can always follow the position adaptation of the first polygonal shaft 62, while maintaining stable torque transmission capability. The second helical gear 833 is fixedly connected with the power input rod 83, and through the meshing relationship with the first helical gear 832, the rotational power of the first polygonal shaft 62 in the longitudinal support seat 60 is converted into the rotation of the transverse power input rod 83, so as to realize the rotation of the worm 84, and finally drive the rotation of the gear 86, and drive the flexible rotation effect of the retainer 90.

[0051] As shown in Figure 8 In some examples, a plurality of lifting rings 11 are also arranged on the vehicle body 10, such as four lifting rings 11, which facilitate the overall movement of the device;

[0052] As shown in Figure 2 In some examples, the retainer 90 further includes a sleeve 91 at the upper part, which is used to sleeve on the upper main shaft of the landing gear, and the retainer 90 further includes two horizontal fixed seats 92 at the bottom end, which correspond to sleeve two-direction wheel shaft bodies respectively, to ensure that the landing gear can be stably supported on the retainer 90 during the overall maintenance process;

[0053] As shown in Figure 9 and Figure 10 As shown in In some examples, a plurality of elastic stop pieces 76 are arranged on the slide way where the sliding block 741 is located, and the positions of the stop pieces 76 correspond to the two staggered ends of the upper and lower ends of the first and second tapered friction rollers 711 and 721. For example, if the top of the first tapered friction roller 711 is higher than the top of the second tapered friction roller 721, the stop piece 76 is installed at the corresponding position of the top of the second tapered friction roller 721, and the bottom is the same. In the present example, by installing the stop piece 76, when the sliding block 741 slides to the position of the stop piece 76, it has a reminding sound or a sudden feeling, prompting the operator to start the single-axis transmission state of the first drive shaft 71 or the second drive shaft 72 when the sliding block 741 slides out of the position of the stop piece 76, which has a feedback effect.

[0054] The above is only an embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A guide support structure for replacing large components of an aircraft, characterized in that, include: Vehicle body (10); A longitudinal support seat (60) is provided on the vehicle body (10); The linkage operation adjustment mechanism (70) is provided on the side wall of the longitudinal support (60) to provide two independent transmission powers with variable speeds to the longitudinal support (60); The lifting mechanism (80) is mounted on the longitudinal support seat (60) and is capable of being lifted and moved. The lifting mechanism (80) is also provided with a rotatable retainer (90). The retainer (90) is used to fix the aircraft landing gear in the disassembled state. The lifting power of the lifting mechanism (80) and the rotation power of the retainer (90) both come from the longitudinal support seat (60). The longitudinal support (60) includes a seat body with a height higher than the retainer (90), and two lead screws (61) located on both sides of the seat body in the horizontal direction are provided in the seat body. The two ends of the lifting mechanism (80) are screwed onto the two lead screws (61). The seat body is also provided with a first polygonal shaft (62) located between two lead screws (61), and the middle part of the lifting mechanism (80) is driven to the first polygonal shaft (62). Both lead screws (61) and the first polygonal shaft (62) are driven to the linkage operation adjustment mechanism (70). The linkage operation adjustment mechanism (70) includes an operation box located on the upper side wall of the longitudinal support (60). The linkage operation adjustment mechanism (70) also includes: The first drive shaft (71) is vertically positioned in the control box; The second drive shaft (72) is vertically disposed in the operation box opposite the first drive shaft (71) and spaced apart from the first drive shaft (71); An operating spindle (73) is rotatably disposed between the first drive shaft (71) and the second drive shaft (72). The operating spindle (73) is in an inclined state, with its top end extending to the outside of the operating box and connected to a turntable (75). The transmission control mechanism (74) is movably mounted on the side wall of the control box; the transmission control mechanism (74) is connected to the operating spindle (73) and is used to realize the lifting and / or rotating action of the cage (90) by changing the contact position and / or contact state between the operating spindle (73) and the first drive shaft (71) and the second drive shaft (72).

2. The guide support structure for replacing large components of an aircraft according to claim 1, characterized in that: The vehicle body (10) is also provided with a traction mechanism (30), and the outer end of the traction mechanism (30) is provided with an opening for hand-holding or connection to a power vehicle. A steering mechanism (20) is also provided on the connection end between the traction mechanism (30) and the vehicle body (10). The steering mechanism (20) is connected to the rotation control component of the steering wheel at the bottom of the vehicle body (10).

3. The guide support structure for replacing large components of an aircraft according to claim 2, characterized in that: The lifting mechanism (80) includes: The lifting seat (81) is movably mounted on the longitudinal support seat (60), and both ends of the lifting seat (81) are screwed onto the two lead screws (61). The protective box (82) is fixedly installed on the top end face of the lifting seat (81); A power input rod (83) is rotatably disposed in the protective box (82), and the end of the power input rod (83) is connected to the first polygonal shaft (62) for transmission. The worm gear (84) is fixedly mounted on the power input rod (83); The worm gear (85) is disposed in the inner cavity of the protective box (82) via a rotating shaft and is meshed with the worm (84). The gear (86) is coaxially arranged with the worm gear (85) and is used to rotate synchronously with the worm gear (85); Two rack rods (87) are provided in the inner cavity of the protective box (82) and are telescopically movable in the direction of the retainer (90). The outer ends of the rack rods (87) are rotatably connected to the slide (88), and the slide (88) is linearly slidably connected to the outer wall of the retainer (90). The inner sidewalls of the two rack rods (87) respectively mesh with the upper and lower ends of the gear (86). The hinge (89) is fixedly mounted on the outer wall of the protective box (82) and located between the two rack bars (87). The retainer (90) is rotatably connected to the hinge (89).

4. The guide support structure for replacing large components of an aircraft according to claim 3, characterized in that: A first conical friction roller (711) is provided on the first drive shaft (71), a second conical friction roller (721) is provided on the second drive shaft (72), two sets of second transmission components (722) are provided at the top of the second drive shaft (72), the other end of the second transmission component (722) is connected to the lead screw (61), a first transmission component (712) is provided at the bottom of the first drive shaft (71), and the other end of the first transmission component (712) is connected to the first polygonal shaft (62); wherein, the projected contour lines of the first conical friction roller (711) and the second conical friction roller (721) are parallel.

5. A guide support structure for replacing large components of an aircraft according to claim 4, characterized in that: The operating spindle (73) includes: The second polygonal axis (731) is rotatably disposed on the top surface of the operation box and connected to the turntable (75). The movable bushing (732) is sleeved on the outer side of the bottom end of the second polygonal shaft (731) and can move linearly. An inflatable friction wheel (733) is fixedly mounted on the top of the movable bushing (732) and is capable of contacting the first conical friction roller (711) and / or the second conical friction roller (721); The central sealed air inlet end (734) is fixedly installed at the bottom end of the movable bushing (732) and connected to the pneumatic friction wheel (733) for receiving the gas input by the transmission control mechanism (74).

6. A guide support structure for replacing large components of an aircraft according to claim 5, characterized in that: The transmission control mechanism (74) includes: A slider (741) is movable along the axis of the operating spindle (73) and is snapped onto the outer wall of the operating box; An air cylinder (742) is fixedly mounted on the slider (741), and a piston and a piston rod (746) connected to the piston are also provided inside the air cylinder (742). A handle (743) is fixedly disposed on the outside of the slider (741), and a groove is also provided on the handle (743); The pressure plate (744) is rotatably disposed in the groove by means of a torsion spring. The bottom end of the pressure plate (744) is provided with a rotatable tilting rod (745), which is connected to the outer end of the piston rod (746). The connecting rod (747) is connected at one end to the air cylinder (742) and at the other end to the movable bushing (732) through the bearing rotating seat (748); The gas pipeline (749) is connected at one end to the output end of the gas cylinder (742) and at the other end to the central sealed air inlet end (734).

7. A guide support structure for replacing large components of an aircraft according to claim 5, characterized in that: The power input lever (83) is also provided with: The extension seat (831) is fixedly installed on the outer wall of the protective box (82) and is not in contact with the outer side of the outer wall of the first polygonal shaft (62); The first helical gear (832) has a polygonal hole at its center and can be slidably sleeved on the outside of the first polygonal shaft (62) through the polygonal hole; The second helical gear (833) is fixedly sleeved on the power input rod (83) and meshes with the first helical gear (832).

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