Small platform aircraft wheel set lock down support mechanism for aircraft simulated in flight testing

Abstract

The application discloses a small platform airplane wheel set locking support mechanism for simulating air test of an airplane, which comprises a frame body, a lifting mechanism, two base plates fixed oppositely on an upper bottom plate and a stopper arranged on the base plates. When the pressing piece is pressed by a tire at a pressing piece groove, the tire stopper is clamped on both sides of the tire. The pulling cylinder pulls two tire plug blocks to move oppositely inward and abut against the tire and the upper bottom plate at an included angle. The application relates to the technical field of airplane test and is suitable for test scenes without a row of cranes or limited top space. The tire stopper, the tire stopper and the tire plug block are linked to form bidirectional limiting and increase the bearing area of the tire. In the process of natural sitting of the airplane tire, the tire is clamped and fixed in the front-rear and left-right directions, the airplane tire is effectively fastened, and uncontrollable displacement of the airplane caused by vibration or external force in the test on the test stand is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft testing, in particular to a small platform aircraft wheel set locking support mechanism for simulating in-flight test of an aircraft. BACKGROUND

[0002] In the in-flight test of an aircraft, the overall attitude of the aircraft needs to be adjusted by a support platform to simulate the flight state. The traditional method uses a large overall support platform to achieve attitude control by adjusting the tire pressure or adding or removing shims, but has significant defects: the tire pressure adjustment operation is complex, has large errors and is prone to trigger the safety alarm of the aircraft; the shim adjustment is only suitable for the ground stage, and if secondary adjustment is needed after the aircraft is lifted, the aircraft needs to be lifted off, which cannot be implemented when limited by the space of the factory building (such as no gantry crane equipment or insufficient overhead clearance). In addition, the large platform needs to be matched with the size of the aircraft, and the adjustment process needs to coordinate the synchronous operation of multiple points, which is low in efficiency and difficult to ensure accuracy. In view of the above problems, a small mechanism independent of the overall platform and capable of single-point adjustment of the tire locking state is needed to achieve flexible and accurate attitude fine adjustment. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a small platform aircraft wheel set locking support mechanism for simulating in-flight test of an aircraft, which solves the problems of difficult aircraft attitude adjustment and low tire fixing efficiency.

[0004] To achieve the above-mentioned purpose, the present application realizes the following technical scheme: a small platform aircraft wheel set locking support mechanism for simulating in-flight test of an aircraft, comprising:

[0005] a frame body, the frame body comprising an upper bottom plate and a lower bottom plate arranged vertically, the lower bottom plate being provided with a lead screw at the four corners, the upper bottom plate being sleeved on the lead screw and being capable of being fixed at any position of the lead screw by a locking piece;

[0006] a lifting mechanism arranged between the upper bottom plate and the lower bottom plate for adjusting the height position of the upper bottom plate;

[0007] two base plates fixed oppositely on the upper bottom plate, the opposite surfaces of the two base plates being provided with tire stop blocks, the inner wall surface of the tire stop block being an arc surface; the tire stop block being provided with a pressing piece groove on both sides;

[0008] a stop piece arranged on the base plate; the stop piece comprising a base block fixed with the base plate, the base block being rotatably connected with a shaft, the shaft being provided with a tire stop plate and a pressing piece, the pressing piece being matched with the pressing piece groove; when the pressing piece is pressed and combined at the pressing piece groove, the tire stop plate is clamped on both sides of the tire;

[0009] Tire block, slidingly connected below the tire stop block, supporting the part between the tire and the upper bottom plate; the tire block is fixed with a side wall plate, which penetrates the upper bottom plate;

[0010] Pulling cylinder, arranged below the upper bottom plate, and fixed with the side wall plate at both ends;

[0011] Locking member, arranged below the tire stop block, one end of which extends out of the surface of the pressing groove, and the other end clamps the tire block; when the tire seat is arranged on the tire stop block, the pressing block presses the locking member and makes the locking member disengage from the tire block, and the pulling cylinder pulls the two tire blocks to move inward and tightly abut against the part between the tire and the upper bottom plate.

[0012] Preferably, a pulling rod is arranged below the upper bottom plate, an inner push plate is sleeved on the pulling rod, and abutting blocks are arranged at the top of the inner push plate on both sides; the output end of the lifting mechanism abuts against the inner push plate, a push arm member is arranged at the top of the inner push plate, and the push arm member pushes the side wall plate to move to both sides.

[0013] Preferably, the push arm member comprises an axle seat fixed with the inner push plate, beam arms are hinged on both sides of the axle seat, and the beam arms are hinged on the side wall plate; when the inner push plate is jacked up, the two beam arms are parallel, driving the side wall plate and the tire block to move to both sides.

[0014] Preferably, the pulling cylinder comprises a cylinder body, piston rods are arranged in the cylinder body on both sides, end plates are fixed on the end of the cylinder body where the piston rods extend out, and the end plates are fixed with the side wall plate; when the piston rods move to both sides, a vacuum cavity is formed at the opposite ends of the piston rods in the cylinder body.

[0015] Preferably, a frame is arranged at the bottom of the tire stop block, the tire block is slidingly connected in the frame, and an opening is formed in the end of the frame towards the inside for the tire block to extend out;

[0016] The locking member comprises a Z-shaped shifting rod rotatingly connected on the frame, the part of the Z-shaped shifting rod above the frame is connected with the frame through an elastic member, a push rod is arranged at the top of the part of the Z-shaped shifting rod above the frame, the top of the push rod penetrates the tire stop block and abuts against the pressing block, and a clamping tooth is arranged below the part of the Z-shaped shifting rod in the frame; a clamping tooth strip is arranged at the top of the tire block, and the clamping tooth can be clamped on the clamping tooth strip.

[0017] Preferably, a damping sheet is arranged on the bottom surface of the inner cavity of the frame, and the tire block abuts against the damping sheet.

[0018] Preferably, the number of the lifting mechanisms is at least two, and a shunt valve is connected to the oil pipe of each lifting mechanism.

[0019] Preferably, the top surface of the upper bottom plate is provided with TP seats at four corners.

[0020] Preferably, the locking member comprises at least two nuts screwed on the screw rod, and is arranged on the upper and lower surfaces of the upper bottom plate respectively.

[0021] The beneficial effects of the present application: by using the small platform airplane wheel set locking support mechanism for airplane simulation air test provided by the present application, independent small platform design is adopted, without relying on large lifting equipment, especially suitable for test scenes without row hoist or limited top space, significantly improving environmental adaptability.

[0022] The tire block, tire baffle and tire plug linkage are adopted to form bidirectional limiting and increase the bearing area of the tire, form clamping and fixing of the tire in front and back and left and right directions in the process of natural sitting of the airplane tire, effectively fasten the airplane tire, prevent uncontrollable displacement of the airplane caused by vibration or external force in the test on the test stand, and ensure the attitude stability. At the same time, the tire plug can be wedged at the included angle between the tire and the upper bottom plate in the process of adjustment of the lifting mechanism to complete the bearing surface of the tire, avoid uneven local stress, and improve the support reliability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the axonometric view of the present application;

[0024] Figure 2 is the structural schematic view of the tire block of the present application arranged on the upper bottom plate;

[0025] Figure 3 is the front view of the present application;

[0026] Figure 4 is the tire locking state view of the present application;

[0027] Figure 5 is the enlarged structural schematic view of A in the present application; Figure 4

[0028] is the axonometric view of the inner push plate of the present application; Figure 6

[0029] is the structure schematic view of the cylinder pulling of the present application; Figure 7

[0030] is the use state view of the present application. Figure 8 Explanation of reference signs in the drawings:

[0031]

[0032] ​1, the upper bottom plate, 2, the lower bottom plate, 3, the lifting mechanism, 4, the screw rod, 5, the base plate, 6, the tire stop block, 7, the tire plug block, 8, the base block, 9, the shaft, 10, the tire stop plate, 11, the pressing piece, 12, the TP seat, 13, the pressing piece groove, 14, the side wall plate, 15, the inner push plate, 16, the abutting block, 17, the pull rod, 18, the beam arm, 19, the pull cylinder, 20, the flow divider, 21, the push rod, 22, the Z-shaped shifting lever, 23, the clamping tooth, 24, the clamping tooth bar, 25, the damping piece, 26, the shaft seat, 27, the end plate, 28, the piston rod, 29, the vacuum cavity. DETAILED DESCRIPTION

[0033] In order to better explain the present application, in order to facilitate understanding, the following will be combined with the drawings, through specific embodiments, the present application is described in detail.

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. As long as the effect of the present application can be played, various changes can be made to the implementation scheme.

[0035] By the personnel in the art, the parts in the case are connected in turn, the specific connection and operation sequence should be referred to the following working principle, its detailed connection means is the technology known in the art, the following mainly introduces the working principle and process.

[0036] As Figures 1 to 8 shown, the embodiment of the present application proposes a small platform aircraft wheel set locking support mechanism for aircraft simulated air test, which comprises a frame body, a lifting mechanism 3 and a tire fixing seat.

[0037] In the embodiment, the frame body comprises an upper bottom plate 1 and a lower bottom plate 2 arranged in upper and lower, the lower bottom plate 2 is provided with a screw rod 4 at four corners, the upper bottom plate 1 is sleeved on the screw rod 4, and the upper bottom plate 1 can be fixed at any height position of the screw rod 4 by a locking piece. In the implementation, the lower bottom plate 2 is fixed on the detection platform, the locking piece is loosened, and the aircraft attitude is adjusted by the driving of the lifting mechanism 3, after the adjustment is completed, the upper bottom plate 1 at the adjusted position is fixed on the screw rod 4 by the locking piece.

[0038] The top surface of the upper bottom plate 1 is provided with a TP seat 12 at four corners, and the TP seat 12 is a measuring point. Exemplarily, first, each tire of the aircraft is respectively and correspondingly seated on the mechanism. The reflecting part of the laser measuring instrument is arranged on the TP seat 12, and the laser emitting part is correspondingly arranged with the reflecting part. The displacement and attitude of the upper bottom plate 1 are monitored by the cooperation of the laser emitting part and the reflecting part of the laser measuring instrument, the aircraft attitude adjustment is completed by the cooperation of the lifting mechanism 3, so as to indirectly reflect the real-time attitude of the aircraft, and finally the aircraft attitude reaches the requirement.

[0039] The locking member in the embodiment includes at least two nuts screwed on the screw rod 4, which are respectively arranged on the upper and lower surfaces of the upper base plate 1. When the lifting mechanism 3 is adjusted, the nut above the upper base plate 1 is loosened, so that the upper base plate 1 can only move up and down around the screw rod 4, and after the adjustment is completed, the two nuts are fastened and attached to the upper and lower surfaces of the upper base plate 1, thereby forming the locking and fixing of the upper base plate 1 after the adjustment is completed. After the adjustment is completed, the hydraulic jack is unloaded, and the lifting mechanism 3 can be removed.

[0040] The lifting mechanism 3 is arranged between the upper base plate 1 and the lower base plate 2, and is used for adjusting the height position of the upper base plate 1. The lifting mechanism 3 is a hydraulic jack, which is detachably arranged on the lower base plate 2 or is seated on the lower base plate 2. The number of the lifting mechanism 3 is at least two, and the oil pipe of each lifting mechanism 3 is connected with a flow divider 20, which ensures the synchronous lifting and the same distance of each hydraulic jack. The flow divider 20 is connected with a hand pump, and the hand pump controls the hydraulic jack by increasing or decreasing pressure.

[0041] The tire fixing seat in the embodiment includes a base plate 5, a blocking piece arranged on the base plate 5, and a tire plug 7. The base plate 5 is two, which are oppositely fixed on the upper base plate 1, and the opposite surfaces of the two base plates 5 are provided with tire blocking blocks 6, and the inner wall surface of the tire blocking block 6 is an arc surface. The two tire blocking blocks 6 form a cavity capable of accommodating an aircraft tire. When the aircraft tire is placed, the wall surface thereof is in contact with the tire blocking block 6, thereby limiting the front and back movement of the tire.

[0042] In addition, the tire blocking block 6 is provided with a pressing groove 13 on both sides. The blocking piece is arranged on the base plate 5, and is used for limiting the left and right movement of the tire. The blocking piece in the embodiment includes a base block 8 fixed on the top of the base plate 5, a shaft 9 rotatably connected on the base block 8, a tire blocking plate 10 and a pressing piece 11 arranged on both ends of the shaft 9, and the pressing piece 11 is matched with the pressing groove 13. The angle between the tire blocking plate 10 and the pressing piece 11 is a certain angle, and the included angle therebetween is 70°-80°. When the aircraft tire is placed, the tire drives the pressing piece 11 to move downward, and when the pressing piece 11 is pressed, the tire blocking plate 10 is driven by the shaft 9 to flip downward. When the pressing piece 11 is pressed in the pressing groove 13, the tire blocking plate 10 is clamped on both sides of the tire, thereby forming the automatic left and right direction limiting of the tire through the mechanical linkage triggered by the gravity of the tire, and the tire is quickly fixed without other additional operations.

[0043] In addition, the bottom of the tire blocking block 6 is provided with a frame, the tire plug 7 is slidably connected in the frame, and the frame is provided with an opening on one end facing the inside, through which the tire plug 7 extends. In the implementation, the tire plug 7 can be slidably connected below the tire blocking block 6, and after extending out of the opening of the frame, the tire plug 7 can be supported at the part of the included angle between the tire and the upper base plate 1, thereby complementing the bottom of the tire which cannot be supported by the tire blocking block 6, increasing the supporting surface of the tire, and preventing the deformation of the tire during the detection process from affecting the attitude of the aircraft.

[0044] For example, the tire block 7 is fixed with a side wall plate 14 which penetrates the upper base plate 1. Further, the mechanism also includes a pulling cylinder 19 and a locking member for limiting the tire block 7 in the frame. The pulling cylinder 19 is arranged below the upper base plate 1 and is fixed at both ends with the side wall plate 14. Through the retraction force of the pulling cylinder 19, the side wall plate 14 and the tire block 7 are relatively displaced, so that the tire block 7 can be translated out of the frame and supported at the angle between the tire and the upper base plate 1.

[0045] In the embodiment, the pulling cylinder 19 includes a cylinder body, both sides of which are provided with piston rods 28 inserted into the inside of the cylinder body. The end of the piston rod 28 extending out of the cylinder body is fixed with an end plate 27, and the end plate 27 is fixed with the side wall plate 14. When the tire block 7 is retracted into the frame, the side wall plate 14 drives the piston rods 28 to move to both sides, and the opposite ends of the two piston rods 28 in the cylinder body form a vacuum cavity 29. At this time, the two piston rods 28 are pulled back by the vacuum cavity 29. When the tire block 7 loses the positioning of the locking member, the two piston rods 28 are reset by the pulling force of the vacuum cavity 29, and then the side wall plate 14 and the tire block 7 are displaced, so that the tire block 7 can be wedged at the angle between the tire and the upper base plate 1 to complete the supporting surface of the tire.

[0046] It should be noted that the locking member is arranged below the tire block 6, and a through hole is opened on the frame for the locking member to pass through. In the implementation, one end of the locking member extends out of the surface of the pressing piece groove 13, and the other end clamps the tire block 7 to fix the tire block 7. When the tire block 6 is arranged on the tire block 6, the pressing piece 11 presses the locking member and makes the locking member disengage from the tire block 7. At this time, the pulling cylinder 19 is reset to pull the two tire blocks 7 to relatively move inward and abut at the angle between the tire and the upper base plate 1.

[0047] The locking member in the embodiment includes a Z-shaped lever 22 which is rotatably connected to the frame. The part of the Z-shaped lever 22 above the frame is connected to the frame by an elastic member, which is preferably a spring. The top of the part of the Z-shaped lever 22 above the frame is provided with a push rod 21, the top of the push rod 21 penetrates the tire block 6 and abuts against the pressing piece 11. The part of the Z-shaped lever 22 inside the frame is provided below with a clamping tooth 23. The top of the tire block 7 is provided with a clamping tooth bar 24, and the clamping tooth 23 can be clamped on the clamping tooth bar 24. In the implementation process, the tire block 6 is arranged on the tire block 6 to drive the pressing piece 11 to be pressed at the pressing piece groove 13. The pressing piece 11 contacts the push rod 21 to drive the push rod 21 to descend, the push rod 21 drives the Z-shaped lever 22 to twist, and the clamping tooth 23 at the bottom of the Z-shaped lever 22 disengages from the clamping tooth bar 24. At this time, the tire block 7 is pulled by the pulling cylinder 19 to relatively move inward and abut at the angle between the tire and the upper base plate 1.

[0048] Further, the bottom surface of the inner cavity of the frame is provided with a damping sheet 25, and the tire plug 7 abuts against the damping sheet 25. The damping sheet 25 is used to slow down the moving speed of the tire plug 7 when moving inward, so that the tire plug 7 is slowly wedged into the angle between the tire and the upper bottom plate 1, and the fitting effect of the tire plug 7 and the tire is ensured.

[0049] Further, in order to reset the tire plug 7 to move to both sides, the embodiment is further provided with a reset mechanism for the tire plug 7 to move to both sides, which includes a pull rod 17 arranged below the upper bottom plate 1, a inner push plate 15 sleeved on the pull rod 17, a abutting block 16 arranged on the top of the inner push plate 15, and an output end of the lifting mechanism 3 abutting against the inner push plate 15. The top of the inner push plate 15 is provided with a push arm member, which pushes the side wall plate 14 to move to both sides. Exemplarily, the push arm member includes a shaft seat 26 fixed with the inner push plate 15, two beam arms 18 hinged on the shaft seat 26, and the beam arms 18 are hinged on the side wall plate 14; when the inner push plate 15 is lifted, the two beam arms 18 are parallel, and the side wall plate 14 and the tire plug 7 are driven to move to both sides.

[0050] In the specific implementation process, the lifting mechanism 3 is pushed to work, the inner push plate 15 is pushed to move upward, the push arm member is changed from the inclined state to the parallel state, the side wall plate 14 and the tire plug 7 are pushed to move to both sides, and finally the clamping teeth 23 are clamped on the clamping rack 24 to re-fix the tire plug 7. After the lifting mechanism 3 is removed, the inner push plate 15 naturally drops, and the beam arm 18 is naturally bent to reset when the pull cylinder 19 is retracted.

[0051] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A wheel assembly locking support mechanism for a small platform aircraft used in simulated aerial testing, characterized in that, include: The frame includes an upper base plate and a lower base plate arranged vertically. The lower base plate has lead screws at its four corners. The upper base plate is sleeved on the lead screws and can be fixed at any position on the lead screws by locking components. A lifting mechanism is provided between the upper base plate and the lower base plate for adjusting the height of the upper base plate; Two substrates are fixed to the upper base plate opposite to each other. Tire blocks are provided on the opposite surfaces of the two substrates. The inner wall surface of the tire blocks is arc-shaped. Pressure grooves are opened on both sides of the tire blocks. A stop is provided on the base plate; the stop includes a base block fixed to the base plate, a shaft rotatably connected to the base block, a tire baffle and a pressure plate provided on the shaft, the pressure plate being adapted to a pressure plate groove; wherein, when the pressure plate is pressed into the pressure plate groove by the tire, the tire baffle is secured to the front and rear sides of the tire. A tire plug is slidably connected to the bottom of the tire block, supporting the angle between the tire and the upper base plate; a side wall plate is fixed on the tire plug, and the side wall plate penetrates the upper base plate; a frame is provided at the bottom of the tire block, and the tire plug is slidably connected to the frame, with an opening at the inward end of the frame for the tire plug to extend out. The cylinder is located below the upper base plate and its two ends are fixed to the side wall plate; A locking element is provided below the tire stop block. One end of the locking element extends out of the pressure plate groove surface, and the other end locks the tire plug block. When the tire seat is placed on the tire stop block, the pressure plate presses down on the locking element and disengages the locking element from the tire plug block. The pull cylinder pulls the two tire plug blocks inward relative to each other and presses them against the angle between the tire and the upper base plate. The locking component includes a Z-shaped lever rotatably connected to the frame. The portion of the Z-shaped lever located above the frame is connected to the frame via an elastic element. A push rod is provided at the top of the portion of the Z-shaped lever located above the frame. The top of the push rod passes through the tire stop block and abuts against the pressure plate. A locking tooth is provided below the portion of the Z-shaped lever located inside the frame. A locking tooth strip is provided at the top of the tire stop block, and the locking tooth can engage with the locking tooth strip.

2. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 1, characterized in that: A pull rod is provided below the upper base plate, and an inner push plate is sleeved on the pull rod. Abutting blocks are provided on both sides of the top of the inner push plate. The output end of the lifting mechanism abuts against the inner push plate. A push arm is provided on the top of the inner push plate, and the push arm pushes the side wall panel to move to both sides.

3. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 2, characterized in that: The push arm includes a bearing fixed to the inner push plate, and beam arms are hinged to both sides of the bearing. The beam arms are hinged to the side wall plate. When the inner push plate is lifted, the two beam arms are parallel, driving the side wall plate and the tire plug to move to both sides.

4. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 1, characterized in that: The cylinder includes a cylinder body, on both sides of which piston rods are inserted into the cylinder body. The end of the piston rod extending out of the cylinder body is fixed with an end plate, which is fixed to a side wall plate. When the piston rods move to both sides, a vacuum chamber is formed at the opposite ends of the two piston rods inside the cylinder body.

5. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 1, characterized in that: A damping plate is provided on the bottom surface of the inner cavity of the frame, and the tire plug abuts against the damping plate.

6. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 1, characterized in that: The number of lifting mechanisms is at least two, and each lifting mechanism has a flow divider valve connected to its oil pipe.

7. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 1, characterized in that: TP seats are provided at the four corners of the top surface of the upper base plate.

8. The small platform aircraft wheel assembly locking support mechanism for simulated flight testing as described in claim 1, characterized in that: The locking component includes at least two nuts screwed onto the lead screw, respectively disposed on the upper and lower surfaces of the upper base plate.

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