Aircraft landing gear fatigue test fixing clamp

Abstract

The utility model provides an aircraft landing gear fatigue test fixing clamp which comprises a bottom support arranged on a working face and loading device connecting pieces fixedly connected to the two ends of an aircraft wheel of an aircraft landing gear, and the loading device connecting pieces are fixedly connected to the top of the bottom support. The bottom bracket comprises a bottom plate, the bottom plate is fixedly connected to the working surface, the center of the upper surface of the bottom plate is fixedly connected with a bottom plate supporting piece, the top of the bottom plate supporting piece is fixedly connected with a bottom plate connecting piece, and the bottom plate connecting piece is fixedly connected with a loading device connecting piece; the loading device connecting piece comprises a connecting loading plate, openings are formed in the two ends of the connecting loading plate, first clamping parts are fixedly connected into the openings, first connecting pieces are fixedly connected into the first clamping parts, and a second connecting piece is fixedly connected between the tops of the two connecting loading plates.

Description

TECHNICAL FIELD

[0001] The utility model relates to fatigue test technical field, concretely is a kind of airplane landing gear fatigue test fixing clamp. BACKGROUND

[0002] Main landing gear is an important component of aircraft structure, specifically, main landing gear is aircraft landing device, plays the role of absorbing energy in landing process in the process of landing, can reduce the impact on aircraft in landing process. Aircraft main landing gear needs to bear alternating load in the process of taking off and landing, and its fatigue performance directly affects aircraft flight safety, the fatigue test structure of existing aircraft main landing gear is complex, inconvenient to disassemble and assemble, and additional force is generated in the process of loading in test.

[0003] And in the static force and fatigue test of landing gear, machine wheel cannot be installed, because machine wheel can rotate around wheel shaft, and the surface of machine wheel tire is also not conducive to the installation of loading clamp. If machine wheel is not installed, load is loaded on wheel shaft, and due to the structure, load in part direction cannot be applied. In the prior art, false wheel is used instead of machine wheel, or only fatigue test is carried out on support frame bar.

[0004] A kind of airplane landing gear fatigue test fixing clamp is disclosed in Chinese patent with publication number CN106644431A, provides spatial position constraint consistent with real installation machine state by outer side support, strut support and inner side support to ensure the installation attitude requirement of landing gear, the structure of three supports and landing gear connection place simulates the structure of corresponding connection position of aircraft, can guarantee the force transmission form consistent with actual aircraft, still only fatigue test is carried out on the bar of landing gear, landing gear and machine wheel are not tested as a whole, such test cannot comprehensively detect the alternating stress performance of landing gear either. SUMMARY

[0005] The utility model provides a kind of airplane landing gear fatigue test fixing clamp, its purpose is to solve the technical problem that machine wheel cannot be loaded in prior art.

[0006] The utility model provides a kind of airplane landing gear fatigue test fixed clamp, including setting in the bottom support of working surface and the loading device connecting piece fixedly connected in the wheel end of landing gear, the loading device connecting piece is fixedly connected in the bottom support top;The bottom support includes bottom plate, and the bottom plate is fixedly connected to working surface, bottom plate support is fixedly connected in the center of bottom plate upper surface, and bottom plate support top is fixedly connected with bottom plate connecting piece, and the bottom plate connecting piece is fixedly connected with loading device connecting piece;The loading device connecting piece includes connecting loading plate, and the both ends of connecting loading plate are provided with opening, and the first clamping part is fixedly connected in the opening, and the first connecting piece is fixedly connected in the first clamping part, and the second connecting piece is fixedly connected between the top of two connecting loading plates.

[0007] Further, the loading device connecting piece is provided with a fixing structure; the fixing structure includes two fixing plates fixedly connected to one side of each connecting loading plate away from the wheel; the both ends of the fixing plate are provided with openings for penetrating the first connecting piece, and the center of one of the fixing plates is fixedly connected with a third connecting piece perpendicular to the fixing plate.

[0008] Further, the loading device connecting piece and the wheel are fixedly connected with a wheel clamp; the wheel clamp includes two clamping plates; each clamping plate is fixedly connected to the two sides of the wheel.

[0009] Further, the clamping plate is provided with a plurality of first mounting holes along the central circular array; each connecting loading plate is provided with a plurality of second mounting holes along the central circular array; each fixing plate is provided with a plurality of third mounting holes along the central circular array; each first mounting hole, each second mounting hole, and each third mounting hole are matched.

[0010] Further, the top of the bottom plate connecting piece is provided with an arc-shaped support; the arc-shaped bearing is provided with a first mounting hole, and each first mounting hole, each second mounting hole, and each third mounting hole are penetrated by a screw for fixedly connecting the bottom plate connecting piece, each clamping plate, each connecting loading plate, and each fixing plate.

[0011] Further, the bottom of the bottom plate connecting piece is provided with a support slot, and the bottom plate support is arranged in the support slot; the bottom plate connecting piece and the bottom plate support are provided with a communication pin hole; the pin hole is penetrated by a limiting pin.

[0012] Further, the connecting loading plate is provided with a plurality of connecting holes matched with the thread holes of the wheel, and each connecting hole and each thread hole are penetrated by a screw.

[0013] Further, each of the clamping plate is provided with a first side hole in the center, each of the connecting loading plate is provided with a second side hole, the fixed plate without the third connecting piece is provided with a third side hole in the center; the first side hole, the second side hole and the third side hole are communicated, and are used for penetrating the connecting piece of the machine wheel and the landing gear.

[0014] The aircraft landing gear fatigue test fixing clamp has at least the following beneficial effects:

[0015] The aircraft landing gear fatigue test fixing clamp provided by the utility model can lock the machine wheel through the sandwich structure of the clamping machine wheel of the connecting piece of the loading device, so that the loading device can perform fatigue test on the machine wheel and the connecting piece of the machine wheel and the landing gear.

[0016] The aircraft landing gear fatigue test fixing clamp provided by the utility model can further fix the machine wheel through the machine wheel clamp, and the stability of the machine wheel in fatigue test is improved.

[0017] The aircraft landing gear fatigue test fixing clamp provided by the utility model can further fix the machine wheel through the machine wheel clamp, and the stability of the machine wheel in fatigue test is improved. ACCURACY OF DRAWINGS

[0018] Figure 1 The utility model discloses a kind of aircraft landing gear fatigue test fixing clamps, and the structure schematic diagram of the aircraft landing gear fatigue test fixing clamp is shown in the figure;

[0019] Figure 2 The utility model discloses a kind of aircraft landing gear fatigue test fixing clamps, and the structure schematic diagram of the aircraft landing gear fatigue test fixing clamp is shown in the figure;

[0020] Figure 3 The utility model discloses a kind of aircraft landing gear fatigue test fixing clamps, and the structure schematic diagram of the aircraft landing gear fatigue test fixing clamp is shown in the figure;

[0021] Figure 4 The utility model discloses a kind of aircraft landing gear fatigue test fixing clamps, and the structure schematic diagram of the aircraft landing gear fatigue test fixing clamp is shown in the figure;

[0022] Figure 5 The utility model discloses a kind of aircraft landing gear fatigue test fixing clamps, and the structure schematic diagram of the aircraft landing gear fatigue test fixing clamp is shown in the figure;

[0023] In the figure: 1, bottom support;11, bottom plate;12, bottom plate fixing piece;13, bottom plate connecting piece;14, bottom plate support piece;15, support piece slot;16, pin hole;17, limit pin;18, arc support piece;

[0024] 2, machine wheel clamp;21, clamping plate;22, first side hole;23, first mounting hole;

[0025] 3, loading device connecting piece; 31, connecting loading plate; 32, second side hole; 33, connecting hole; 34, second mounting hole; 35, first clamping part; 36, first connecting piece; 37, second connecting piece;

[0026] 4, fixed structure; 41, fixed plate; 42, third side hole; 43, third connecting piece; 44, third mounting hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] Please refer to Figures 1-5 The utility model provides a kind of airplane landing gear fatigue test fixed clamp, including bottom support 1, wheel clamp 2 and loading device connecting piece 3, the bottom support 1 is fixedly connected on working surface, the loading device connecting piece 3 is fixedly connected on the top of the bottom support 1, the wheel clamp 2 is fixedly connected in loading device connecting piece 3.

[0029] The bottom support includes bottom plate 11, bottom plate fixing part 12, bottom plate connecting piece 13 and bottom plate support 14;The bottom plate 11 is placed on the working surface;The bottom plate support 14 is fixedly connected to the center of bottom plate 11;The bottom plate fixing part 12 is arranged on the upper surface of bottom plate 11 four corners, for fixedly connecting bottom plate 11 and working surface;The bottom plate connecting piece 13 is fixedly connected between the wheel clamp 2 and the bottom plate support 14, the bottom plate connecting piece 13 bottom is provided with support slot 15, and the top of the bottom plate support 14 is arranged in the support slot 15;Pin hole 16 is formed in the side surface of the bottom plate connecting piece 13, and pin hole 16 is formed in the side surface of the bottom plate support 14;The pin hole 16 is through hole, and the limit pin 17 is arranged in the pin hole 16;The pin hole 16 is through hole;The bottom plate connecting piece 13 top is provided with the arc-shaped support 18, the arc-shaped support 18 is arc-shaped support, and the arc-shaped support 18 top abuts on the bottom of wheel.

[0030] The machine wheel clamp 2 comprises two clamping plates 21, each of which is a circular clamping plate, and a first side hole 22 is formed in the clamping plate 21 along the axis to expose the threaded hole on the side of the machine wheel; a first step portion is formed on the opposite side of each clamping plate 21, and the inner diameter of the first step portion is slightly smaller than the outer diameter of the machine wheel, that is, the first step portion is in interference fit with the machine wheel, and the two clamping plates 21 are fixedly connected to the two sides of the machine wheel; a plurality of first mounting holes 23 are formed in the clamping plate 21 near the edge, and the second mounting holes 23 are arranged in a circumferential array along the axis; the edge of the clamping plate 21 is an equilateral polygon; the arc-shaped support 18 is arranged between the bottoms of the two clamping plates 21, and the arc-shaped support 18 is provided with first mounting holes 23, and the mounting holes 23 on the arc-shaped support 18 coincide with the mounting holes 23 at the bottoms of the clamping plates 21.

[0031] The loading device connector 3 comprises two connecting loading plates 31; a second step portion is arranged on the opposite side of the connecting loading plate 31, and the inner edge of the second step portion matches the outer edge of the clamping plate 21, that is, the inner edge of the second step portion is an equilateral polygon; the outer tangent circle radius of the second step portion is slightly smaller than the outer tangent circle radius of the clamping plate 21, that is, the second step portion is in interference fit with the clamping plate 21, and the outer edge of the equilateral polygon and the interference fit ensure the fixation between the clamping plate 21 and the connecting loading plate 31, avoid relative rotation, and affect the monitoring data of the loading test; a second side hole 32 is formed in each connecting loading plate 31; the diameter of the second side hole 32 is smaller than that of the first side hole 22, and the second side hole 32 is used for arranging the connector of the machine wheel and the support rod; a plurality of connecting holes 33 are formed in each connecting loading plate 31; each connecting hole 33 coincides with the threaded hole on the side of the machine wheel; each connecting hole 33 is arranged near the second side hole 32; the connecting holes 33 are uniformly arranged in a circular array along the center of the connecting loading plate 31; a plurality of second mounting holes 34 are formed in the connecting loading plate 31 in a circular array along the center, and the second mounting holes 34 coincide with the first mounting holes 23; during assembly, the first mounting holes and the second mounting holes can be connected by screws or interference fit by pins, which can fixedly connect the connecting loading plate 31 and the clamping plate 21 and will not rotate relatively; openings are formed at the two ends of the connecting loading plate 31, and the openings are fixedly connected with first clamping portions 35; the connecting mode of the first clamping portion 35 and the connecting loading plate 31 can be integrally formed with at least one connecting loading plate 31, or can be fixedly connected by bolts and the like; a first connector 36 is connected in each first clamping portion 35 by a first fastener, and the first connector 36 is used for connecting the loading device in the x-axis direction; a second connector 37 is formed at the top of the connecting clamping plate 31; and the second connector 37 is used for connecting the loading device in the y-axis direction.

[0032] The loading device connector 3 is externally provided with a fixing structure 4; the fixing structure 4 comprises two fixing plates 41; each fixing plate 41 is fixedly connected to the side of the loading plate 31 away from the wheel; one of the fixing plates 41 is provided with a third side hole 42 in the center, used for the connection between the wheel and the supporting rod; the other fixing plate 41 is provided with a third connector 43 in the center, used for fixing the loading device in the z-axis direction; each fixing plate 41 is provided with an opening on both sides, used for penetrating the first connector 36; each fixing plate 41 is provided with a plurality of third mounting holes 44, each third mounting hole 44 is matched with each second mounting hole 34 and each first mounting hole 23, and the clamping plate 21, the loading plate 31 and the fixing plate 41 are fixedly connected by penetrating the third mounting hole 44, the second mounting hole 34 and the first mounting hole 23 with screws.

Claims

1. An aircraft landing gear fatigue test fixture characterized by, The utility model provides a kind of loading device connecting piece (3) including being arranged in the bottom support (1) of working face and the loading device connecting piece (3) fixedly connected to the both ends of machine wheel of landing gear, the loading device connecting piece (3) is fixedly connected to the top of bottom support (1);The bottom support (1) includes bottom plate (11), the bottom plate (11) is fixedly connected to working face, the top surface center of bottom plate (11) is fixedly connected with bottom plate support (14), the top of bottom plate support (14) is fixedly connected with bottom plate connecting piece (13), and bottom plate connecting piece (13) is fixedly connected with loading device connecting piece (3);The loading device connecting piece (3) includes connecting loading plate (31), the both ends of connecting loading plate (31) are provided with opening, the first clamping part (35) is fixedly connected in the opening, the first connecting piece (36) is fixedly connected in the first clamping part (35), and the second connecting piece (37) is fixedly connected between the top of two connecting loading plates (31).

2. The fatigue test fixture for an aircraft landing gear according to claim 1, wherein The loading device connecting piece (3) is provided with fixed structure (4) outside;The fixed structure (4) includes two fixed plates (41) respectively fixedly connected to the side of each connecting loading plate (31) away from machine wheel;The both ends of fixed plate (41) are respectively provided with opening for being provided with first connecting piece, and the center of one fixed plate (41) is fixedly connected with third connecting piece (43) perpendicular to fixed plate (41).

3. An aircraft landing gear fatigue test fixture clamp according to claim 2, wherein, The loading device connecting piece (3) is fixedly connected with machine wheel clamp (2) between machine wheel;The machine wheel clamp (2) includes two clamping plates (21);Each clamping plate (21) is fixedly connected to the both sides of machine wheel.

4. The fatigue test fixture of claim 3, wherein, The clamping plate (21) is provided with a plurality of first mounting holes (23) along the center annular array;Each connecting loading plate (31) is provided with a plurality of second mounting holes (34) along the center annular array;Each fixed plate (41) is provided with a plurality of third mounting holes (44) along the center annular array;Each first mounting hole (23), each second mounting hole (34) and each third mounting hole (44) are matched.

5. An aircraft landing gear fatigue test fixture clamp according to claim 4, wherein, The top of bottom plate connecting piece (13) is provided with arc-shaped support (18);The first mounting hole (23) is opened in arc-shaped support (18), and each first mounting hole (23), each second mounting hole (34) and each third mounting hole (44) are provided with screw for fixedly connecting bottom plate connecting piece (13), each clamping plate (21), each connecting loading plate (31) and each fixed plate (41).

6. The fatigue test fixture of claim 1, wherein, The bottom of bottom plate connecting piece (13) is provided with support slot (15), and the bottom plate support (14) is arranged in support slot (15);Bottom plate connecting piece (13) and bottom plate support (14) are provided with communicating pin hole (16);The pin hole (16) is provided with limiting pin (17).

7. The fatigue test fixture of claim 1, wherein, The connecting loading plate (31) is provided with a plurality of connecting holes (33) matched with the thread hole of machine wheel, and each connecting hole (33) and each thread hole are provided with screw.

8. The fatigue test fixture for an aircraft landing gear according to claim 3, wherein Each of the clamping plates (21) is provided with a first side hole (22) in the center, each of the connecting loading plates (31) is provided with a second side hole (32), and the fixing plate (41) without the third connecting piece (43) is provided with a third side hole (42) in the center; the first side hole (22), the second side hole (32) and the third side hole (42) are communicated, and are used for penetrating the connecting piece of the wheel and the landing gear.

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