Guiding and supporting structure for replacing large components of aircraft

Abstract

The invention relates to the technical field of aircraft maintenance, and particularly discloses a guide supporting structure for replacing large components of an aircraft. The longitudinal supporting seat can be movably arranged on the vehicle body in the horizontal direction; the linkage operation adjusting mechanism is arranged on the side wall of the longitudinal supporting seat and is used for providing two independent transmission powers with variable speeds for the longitudinal supporting seat; the lifting mechanism can be movably arranged on the longitudinal supporting seat in a sleeving mode in a lifting mode, the lifting mechanism is further provided with a rotatable retainer, the retainer is used for fixing an aircraft landing gear in a disassembly and assembly state, and lifting power of the lifting mechanism and rotating power of the retainer both come from the longitudinal supporting seat. According to the invention, multi-degree-of-freedom adjustment in a limited space is realized, and meanwhile, a guide supporting structure with high positioning precision and operation convenience is taken into account, so that the safety and efficiency of replacement operation of large components of an aircraft are improved.

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 used for assistance. Such devices generally have the problems of insufficient positioning accuracy, single adjustment mode, complicated action switching, and low operation efficiency. For example, the traditional supporting structure can only provide a single lifting function and lacks 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 easily cause action interference, making the maintenance action clumsy and time-consuming, requiring multiple people to cooperate, and being prone to collision, thus failing to meet the collaborative requirements of quick lifting and multi-angle rotation of landing gears in complex maintenance environments. In addition, the 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, so as 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 with multi-degree-of-freedom adjustment in limited space while considering high positioning accuracy and operational convenience, so as 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: a vehicle body; a longitudinal supporting seat arranged on the vehicle body; 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; a lifting mechanism capable of lifting and movably arranged on the longitudinal supporting seat, wherein a rotatable retaining frame 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.

[0005] 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.

[0006] 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.

[0007] 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.

[0008] In an available embodiment, the lifting mechanism comprises: a lifting seat movably arranged on the longitudinal support seat, two end portions of the lifting seat are screwed and sleeved on the two lead screws; a protection box is fixedly arranged on the top end face of the lifting seat; a power input rod is 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 is fixedly arranged on the power input rod; a worm wheel is arranged in the inner cavity of the protection box through a rotating shaft body and is in meshing connection with the worm; a gear is coaxially arranged with the worm wheel and is used for synchronous rotation with the worm wheel; two rack rods are movably arranged in the inner cavity of the protection box and are movable in the direction of the holding frame, the outer end of the rack rod is rotatably connected to a sliding seat, the sliding seat is linearly slidably connected to the outer wall of the holding frame, the inner side walls of the two rack rods are respectively meshed on the upper and lower ends of the gear; a hinge seat is fixedly arranged on the outer wall of the protection box and located between the two rack rods, and the holding frame is rotatably connected to the hinge seat.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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. Therefore, 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

[0014] Figure 1 A structure schematic view of a first angle of the guide support structure for aircraft large component replacement provided by the application is shown; Figure 2 A structure schematic view of a second angle of the guide support structure for aircraft large component replacement provided by the application is shown; Figure 3 A side view structure schematic view of the guide support structure for aircraft large component replacement provided by the application is shown; Figure 4 A local enlarged view of A in Figure 3 is shown; Figure 5 A structure schematic view of the retaining frame provided by the application is shown; Figure 6 A structure enlarged view of B in Figure 5 is shown; Figure 7 A structure schematic view of C in Figure 5 is shown; Figure 8 A structure schematic view of the longitudinal support seat provided by the application is shown; Figure 9 A structure schematic view of the linkage operation adjusting mechanism provided by the application is shown; Figure 10 A structure enlarged view of D in Figure 9 is shown; Figure 11 A structure schematic view of the first driving shaft and the second driving shaft provided by the application is shown; Figure 12A structural schematic diagram of the transmission operating mechanism is shown.

[0015] In the figure: 10, vehicle body, 20, steering mechanism, 30, traction mechanism, 60, longitudinal support seat, 70, linkage operating 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, operating main shaft, 74, transmission operating mechanism, 75, rotating disc, 76, stop piece, 81, lifting seat, 82, protection box, 83, power input rod, 84, worm, 85, worm gear, 86, gear, 87, rack rod, 88, sliding seat, 89, hinged 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

[0016] 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 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.

[0017] 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 requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations 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. Without more limitations, an element defined by an "comprising" statement is not excluded from a process, method, article, or apparatus that includes the element - other than where a contrary intention is expressly stated or required by context. The term "two or more" includes two or more than two.

[0018] Please refer to Figures 1 to 12As shown, this application embodiment provides a guide support structure for replacing large components of an aircraft, including: a vehicle body 10; a longitudinal support seat 60 and a lifting mechanism 80. Specifically, the longitudinal support seat 60 is disposed on the vehicle body 10; a linkage operation adjustment mechanism 70 is disposed on the side wall of the longitudinal support seat 60, which is used to provide two independent transmission powers with variable speeds to the longitudinal support seat 60; the lifting mechanism 80 is movably mounted on the longitudinal support seat 60, and the lifting mechanism 80 is also provided with a rotatable retainer 90, which 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 are respectively derived from the longitudinal support seat 60.

[0019] This application provides a guide support structure for replacing large aircraft components, particularly aircraft landing gear. Specifically, a vehicle body 10 serves as the moving carrier, a linkage operation adjustment mechanism 70 provides dual-mode power output, and a lifting mechanism 80 and a retainer 90 form a composite adjustment structure. The retainer 90 effectively prevents collisions between the landing gear and the vehicle body 10. Furthermore, the horizontal multi-directional movement capability of the longitudinal support 60 enables the retainer 90 to have a preliminary positioning function, allowing it to flexibly move to the required working position. The linkage operation adjustment mechanism 70, through its design of adjusting / switching two independent transmission powers, allows a single operating source to separately control the transmission ratio of lifting and rotational movements. The lifting mechanism 80 is mounted on the longitudinal support 60, inheriting the positioning accuracy of the longitudinal support 60 and achieving separate transmission of lifting and rotational power through a dual transmission path of a lead screw 61 and a polygonal shaft. The retainer 90 directly supports the landing gear, and its rotational power originates from the internal transmission structure of the longitudinal support 60, forming a mechanical linkage between lifting and rotational movements. Therefore, this solution achieves spatial decoupling of vertical lifting and horizontal rotation through the nested design of the longitudinal support 60 and the lifting mechanism 80. At the same time, through the power distribution of the linkage operation adjustment mechanism 70, it ensures that the two adjustment actions can be controlled independently or operated in concert, efficiently handling the disassembly and assembly of the cage 90, which requires quick and complex maintenance.

[0020] like Figures 1 to 3 As shown, in some examples, the vehicle body 10 is further provided with a traction mechanism 30, the outer end of which is provided with an opening for hand-held use or connection to a power vehicle; a steering mechanism 20 is also provided at the connection end between the traction mechanism 30 and the vehicle body 10, and the steering mechanism 20 is connected to the rotation control component of the steering wheel at the bottom of the vehicle body 10.

[0021] In the present example, the flexible positioning of the device in the maintenance site is achieved by the combined arrangement of the traction mechanism 30 and the steering mechanism 20. The opening provided at the outer end of the traction mechanism 30 allows the operator to directly hold the traction or connect with the 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 connection end of the traction mechanism 30 and the vehicle body 10 directly drives the steering wheels at the bottom end of the vehicle body 10 through the transmission control components, so that the steering action is linked with the traction operation, avoiding the cumbersome process of separate adjustment during traditional device steering. The transmission connection design of the steering wheel rotation control components directly converts the operation instructions into mechanical motion, reducing the intermediate transmission error, thereby improving the steering accuracy and response speed of the device in narrow maintenance spaces.

[0022] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , and Figure 11 In some examples, further, the longitudinal support seat 60 includes a seat body with a height higher than the holding frame 90, two lead screws 61 are provided 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 screwed and sleeved on the two lead screws 61; The first polygonal shaft 62 is also provided in the seat body and located between the two lead screws 61, and the middle transmission of the lifting mechanism 80 is connected to the first polygonal shaft 62, wherein the two lead screws 61 and the first polygonal shaft 62 are respectively transmission connected to the linkage operation adjustment mechanism 70.

[0023] In the present example, the control of the dual action of the landing gear is achieved by the longitudinal support seat 60. Specifically, the design of the seat body height higher than the holding frame 90 provides sufficient vertical movement space for the lifting mechanism 80, avoiding interference between the holding frame 90 and the seat body during lifting. Two symmetrically distributed lead screws 61 are matched with the threads at the ends 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 part 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 position, and the lifting function of the lifting mechanism 80 is not affected. 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 holding frame 90. The operator can select to drive the lead screws 61 to lift the holding frame 90, or drive the first polygonal shaft 62 to rotate the holding frame 90, or simultaneously lift and rotate the holding frame 90 through a single linkage operation adjustment mechanism 70. When simultaneously lifting and rotating the holding frame 90, different control speeds can be achieved, such as fast descent of the holding frame 90 with slow rotation, or slow descent of the holding frame 90 with fast rotation. A single person can quickly switch and adjust the two action modes according to the actual maintenance needs in a limited space, ensuring mechanical decoupling of lifting and rotating actions, optimizing the overall size of the equipment through compact transmission component arrangement, and adapting to the narrow operating environment in the single-person aircraft maintenance scene.

[0024] As Figure 1 , Figure 2 , Figure 3 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, in some examples, the linkage operation adjustment mechanism 70 further 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 spaced apart from 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 in an inclined state, has a top end extending to the outside of the operation box, and is 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 to 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.

[0025] In the present example, the switching control of the single operation source to the two transmission paths is realized by the limitation 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 vertically and spaced apart, 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, which is convenient for the operator to exert 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 action switching accuracy.

[0026] As 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.

[0027] 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 synchronism 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 the retainer 90 is rotated around the hinge base 89 through the sliding seat 88. The hinge base 89 is used as a rotating fulcrum and 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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; 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; 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-shaft transmission state of the first driving shaft 71 or the second driving shaft 72 when the sliding block 741 slides out of the position of the stop piece 76, which has a feedback effect.

[0037] 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 aircraft large component replacement, characterized by, The utility model relates to a kind of guiding support structures for aircraft large component replacement, including: Vehicle body (10); Longitudinal support seat (60) is arranged on the vehicle body (10); Linkage operation adjusting mechanism (70) is arranged on the side wall of the longitudinal support seat (60), for providing two-speed variable independent transmission power to the longitudinal support seat (60); Lifting mechanism (80) is set on the longitudinal support seat (60) and can be lifted, the lifting mechanism (80) is further provided with rotatable holder (90), the holder (90) is used to fix the aircraft landing gear in disassembled state, the lifting power of the lifting mechanism (80) and the rotating power of holder (90) are all from the longitudinal support seat (60).

2. The guiding support structure for aircraft large component replacement according to claim 1, wherein: The vehicle body (10) is further provided with a traction mechanism (30), and 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) and the vehicle body (10) is further provided with a steering mechanism (20), and the steering mechanism (20) is in transmission connection with the rotation control component of the steering wheel at the bottom end of the vehicle body (10).

3. The guiding support structure for aircraft large component replacement according to claim 1, wherein: The longitudinal support seat (60) includes a seat body higher than the holder (90), and 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 screwed and set on the two lead screws (61); The seat body is further provided with a first polygonal shaft (62) between the two lead screws (61), the middle portion of the lifting mechanism (80) is in transmission connection with the first polygonal shaft (62), and the two lead screws (61) and the first polygonal shaft (62) are all in transmission connection with the linkage operation adjusting mechanism (70).

4. A guide support structure for aircraft large part replacement according to claim 3, characterized in that: The linkage operation adjusting mechanism (70) includes an operation box located on the upper end side wall of the longitudinal support seat (60), and further includes: A first drive shaft (71) is vertically arranged in the operation box; A second drive shaft (72) is vertically arranged in the operation box opposite to the first drive shaft (71) and is arranged in a spaced manner with the first drive shaft (71); An operation main shaft (73) is rotatably arranged between the first drive shaft (71) and the second drive shaft (72), and the operation main shaft (73) is in an inclined state, the top end extends to the outside of the operation box, and a turntable (75) is connected to the top end; A transmission control mechanism (74) is movably arranged on the side wall of the operation box, and the transmission control mechanism (74) is connected to the operation main shaft (73) and is used to realize the lifting action and / or rotating action of the holder (90) by changing the contact position and / or contact state of the operation main shaft (73) with the first drive shaft (71) and the second drive shaft (72).

5. A guide support structure for aircraft large part replacement according to claim 4, characterized in that: The lifting mechanism (80) comprises: A lifting seat (81) is arranged on the longitudinal support seat (60) and can be lifted and lowered, both ends of the lifting seat (81) are screwed and sleeved on the two lead screws (61); A protective box (82) is fixedly arranged on the top end face of the lifting seat (81); A power input rod (83) is rotatably arranged in the protective box (82), and the end of the power input rod (83) is in transmission connection with the first polygonal shaft (62); A worm (84) is fixedly arranged on the power input rod (83); A worm wheel (85) is arranged in the inner cavity of the protective box (82) through a rotating shaft body and is in meshing connection with the worm (84); A gear (86) is coaxially arranged with the worm wheel (85) and is used for rotating synchronously with the worm wheel (85); Two rack rods (87) are arranged in the inner cavity of the protective box (82) and can be telescopically moved towards the holder (90), the outer end of the rack rod (87) is rotatably connected with a sliding seat (88), the sliding seat (88) is linearly slidably connected with the outer wall of the holder (90), and the inner side walls of the two rack rods (87) are respectively meshed in the upper and lower ends of the gear (86); A hinge seat (89) is fixedly arranged on the outer wall of the protective box (82) and is located between the two rack rods (87), and the holder (90) is rotatably connected with the hinge seat (89).

6. The guide support structure for replacing large parts of an aircraft according to claim 5, characterized in that: The first driving shaft (71) is provided with a first conical friction roller (711), the second driving shaft (72) is provided with a second conical friction roller (721), the top end of the second driving shaft (72) is provided with two groups of second transmission assemblies (722), the other end of the second transmission assembly (722) is connected to the lead screw (61), the bottom end of the first driving shaft (71) is provided with a first transmission assembly (712), the other end of the first transmission assembly (712) is connected to the first polygonal shaft (62); wherein the projection contour edge lines of the first conical friction roller (711) and the second conical friction roller (721) are in parallel state.

7. A guide support structure for aircraft large part replacement according to claim 6, characterized in that: The operation spindle (73) comprises: A second polygonal shaft (731) is rotatably arranged on the top end face of the operation box and is connected to the rotating disc (75); An active shaft sleeve (732) is linearly movably sleeved on the bottom end outside of the second polygonal shaft (731); An inflatable friction wheel (733) is fixedly arranged at the top end of the active shaft sleeve (732) and can be in contact with the first conical friction roller (711) and / or the second conical friction roller (721); A central sealed air inlet end (734) is fixedly arranged at the bottom end of the active shaft sleeve (732) and is communicated with the inflatable friction wheel (733) and is used for receiving the gas input by the transmission control mechanism (74).

8. A guide support structure for aircraft large part replacement according to claim 7, characterized in that: The transmission control mechanism (74) comprises: A sliding block (741) is clamped on the outer wall of the operation box and can move along the axis direction of the operation spindle (73); An air cylinder (742) is fixedly arranged on the sliding block (741), and a piston and a piston rod (746) connected to the piston are further arranged in the air cylinder (742); A handle (743) is fixedly arranged on the outer side of the sliding block (741), and a recess is further formed in the handle (743); A pressing plate (744) is rotatably arranged in the recess by a torsion spring, and an inclined rod (745) rotatable is arranged at the bottom end of the pressing plate (744) and connected to the outer end of the piston rod (746); A connecting rod (747) is connected to one end of the air cylinder (742) and rotatably sleeved on the movable shaft sleeve (732) through a bearing rotating seat (748) at the other end; An air path pipeline (749) is connected to the output end of the air cylinder (742) at one end and connected to the center sealing air inlet end (734) at the other end.

9. A guide support structure for aircraft large part replacement according to claim 7, characterized in that: The power input rod (83) is further provided with: An extension seat (831) is fixedly arranged on the outer wall of the protection box (82) and non-contactingly sleeved on the outer side of the outer wall of the first polygonal shaft (62); A first helical gear (832) is arranged at the center of the first helical gear (832) and has a polygonal hole, and the first helical gear (832) is slidably sleeved on the outer side of the first polygonal shaft (62) through the polygonal hole; A second helical gear (833) is fixedly sleeved on the power input rod (83) and engaged with the first helical gear (832).

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