Universal landing frame structure bearing test device

Abstract

The invention discloses a universal landing pad structure bearing test device, and relates to the technical field of landing pad structure bearing. The device can be suitable for testing landing pads of various specifications and sizes, and brings great convenience to structural bearing tests of the landing pads under multiple working conditions. The structure bearing test device comprises a test base, a test piece platform and a load loading system, the test piece platform comprises a test piece base, a plurality of test piece cross beams and test piece cross beam movement mechanisms arranged at the two ends of the test piece cross beams, and a landing frame to be tested is borne through the plurality of test piece cross beams; the transverse actuating cylinder is arranged along the Y direction and is used for applying a Y-direction acting force to the landing frame to be tested; and the lateral actuator cylinder is arranged along the X direction and is used for applying an X-direction acting force to the landing frame to be tested. According to the scheme, actions in all directions and an adjusting mechanism are added, so that the spatial positions of the actuating cylinders in all directions can be conveniently adjusted to adapt to different types of undercarriages, and the test cost, time and manpower are saved.

Description

Technical Field

[0001] The invention relates to the technical field of landing gear structure load-bearing, and in particular to a universal landing gear structure load-bearing test device. Background Art

[0002] The landing gear is the main load-bearing component when the aircraft lands, and its performance is directly related to the use and safety of the aircraft. Therefore, in order to ensure the safety of the aircraft, it is necessary to study the structural bearing strength of the landing gear.

[0003] However, there are many types of aircraft, and with them there are also many types of landing gear. Landing gear can be divided into strut-type landing gear, rocker-type landing gear and other types according to the structural form; it can be divided into single-wheel landing gear, double-wheel landing gear, multi-wheel landing gear and other types according to the number of wheels. In the past, for a certain type of landing gear, it was often necessary to build a special test bench for structural load-bearing tests. In addition, there are also multiple load conditions for the same landing gear, which requires multiple adjustments to the position of the landing gear and the actuator. For traditional fixed test benches, it consumes a lot of financial and human resources. Therefore, there is an urgent need for a structural load-bearing test platform suitable for multiple types of landing gear and multiple working conditions. Summary of the invention

[0004] In view of the above problems, the present invention proposes a universal landing gear structure load-bearing test device, which can be applicable to the testing of landing gears of various specifications and sizes, and brings great convenience to the structural load-bearing test of the landing gear under multiple working conditions.

[0005] The technical solution of the present invention is as follows: the structural load bearing test device comprises a test base 1, a test piece platform 2 and a load loading system 3; The test piece platform 2 includes a test piece base 4, a plurality of test piece cross beams, and a test piece cross beam motion mechanism installed at both ends of the test piece cross beams, and the landing frame to be tested is carried by the plurality of test piece cross beams; The test piece base 4 is fixed in the middle of the test base 1 by bolts, and the test piece base 4 is also fixedly mounted with a first test piece platform rack 17, a second test piece platform rack 18, a first test piece platform guide rail 19, and a second test piece guide rail 20 that are parallel to each other; A plurality of test piece cross beams are perpendicular to the first rack 17 of the test piece platform. The test piece cross beam motion mechanism includes a servo motor 21, a gear 22 and a T-shaped plate 24. The T-shaped plate 24 is slidably connected to the first guide rail 19 of the test piece platform or the second guide rail 20 of the test piece. The servo motor 21 is fixedly mounted on the T-shaped plate 24. The gear 22 is fixedly connected to the output shaft of the servo motor 21 and is meshed with the first rack 17 of the test piece platform or the second rack 18 of the test piece platform. The servo motor 21 drives the test piece cross beam to translate. The load loading system 3 includes a plurality of vertical beams surrounding the test piece platform 2 and a transverse loading system 26 and a lateral loading system 27 installed on the vertical beams. The vertical beams are arranged along the Z direction, and the bottom ends thereof are fixedly connected to the test base 1. The transverse loading system 26 is symmetrically provided with a pair of the test piece platform 2, which includes a cross beam arranged along the X direction and a transverse actuator installed on the cross beam, the cross beam is installed on the vertical beam in a liftable manner, and the transverse actuator is arranged along the Y direction for applying a Y-direction force to the landing gear to be tested; The lateral loading system 27 is symmetrically provided with a pair of side loading systems 27 with the test piece platform 2 as the center, and includes side beams arranged along the Y direction and lateral actuators installed on the side beams. The side beams are installed on the vertical beams in a liftable manner, and the lateral actuators are arranged along the X direction to apply X-direction force to the landing gear to be tested.

[0006] Furthermore, the test piece beam movement mechanism also includes a slider 23 and a hand-operated screw lift 25. The slider 23 can be slidably installed on the first guide rail 19 of the test piece platform or the second guide rail 20 of the test piece. The hand-operated screw lift 25 is fixedly installed on the T-shaped plate 24 and connected to the slider 23. The T-shaped plate 24 is lifted by the hand-operated screw lift 25.

[0007] Furthermore, a fixed crossbeam is fixedly mounted on the top of the vertical beam, and the fixed crossbeam is arranged above the crossbeam along the X direction, and its end extends outward; The transverse loading system 26 also includes a transverse screw linkage lift arranged along the Z direction, the housing of the transverse screw linkage lift is fixedly mounted on the crossbeam, and the top end of the screw of the transverse screw linkage lift is fixedly connected to the fixed crossbeam, and the crossbeam is driven to reciprocate and lift along the Z direction through the transverse screw linkage lift; The lateral loading system 27 also includes a lateral screw-linked elevator arranged along the Z direction, the casing of the lateral screw-linked elevator is fixedly installed on the side beam, and the top end of the screw of the lateral screw-linked elevator is fixedly connected to the fixed crossbeam, and the side beam is driven to reciprocate and lift along the Z direction through the lateral screw-linked elevator.

[0008] Furthermore, a transverse actuating cylinder fixture is slidably mounted on the crossbeam, and the root of the transverse actuating cylinder is fixedly mounted on the transverse actuating cylinder fixture; The crossbeam is also fixedly mounted with a transverse rack arranged along the X direction, and the transverse actuator clamp is fixedly mounted with a transverse servo motor, and the output shaft of the transverse servo motor is fixedly mounted with a transverse gear meshing with the transverse rack; the transverse actuator is driven to reciprocate along the X direction by the transverse servo motor.

[0009] Furthermore, a lateral actuating cylinder fixture is slidably mounted on the side beam, and the root of the lateral actuating cylinder is fixedly mounted on the lateral actuating cylinder fixture; The side beam is also fixedly mounted with a lateral rack arranged along the Y direction, and the lateral actuator clamp is fixedly mounted with a lateral servo motor, and the output shaft of the lateral servo motor is fixedly mounted with a lateral gear meshing with the lateral rack; the lateral actuator is driven by the lateral servo motor to reciprocate along the Y direction.

[0010] Furthermore, the test piece platform 2 has four test piece crossbeams; each crossbeam in the transverse loading system 26 is provided with two transverse actuators, and each side beam in the lateral loading system 27 is provided with two lateral actuators.

[0011] Considering that different types of landing gear, such as two-wheel and four-wheel landing gear, require different test benches, in addition, when conducting tests under different working conditions, it is usually necessary to manually adjust the height of the actuator in each direction, which consumes a lot of time and manpower. Therefore, in this case, various directional movements and adjustment mechanisms are added, so that the spatial position of the actuator in each direction can be easily adjusted to adapt to different types of landing gear, saving test costs, time and manpower.

[0012] Compared with the prior art, this case has the following technical effects: First, the present invention can freely adjust the position of the test piece crossbeam to achieve the purpose of freely adjusting the lateral position of the landing gear; Second, the present invention can select the number of different test piece cross beams to adapt to landing gears of different sizes and weights; 3. The present invention can freely adjust the spatial position of the actuator to meet the loading requirements of different types of landing gears under different working conditions with different spatial loading point positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axial view of the three-dimensional overall structure of the present invention; Figure 2 It is an axial view of the upper and lower surfaces of the test base in the present invention; Figure 3 It is the axial view of the three-dimensional structure of the test piece platform in the present invention; Figure 4 This is an axial view of the crossbeam motion mechanism of the test piece in the present invention; Figure 5 It is the overall axial view of the transverse loading system of the present invention; Figure 6 It is an axial view of the front half of the transverse loading system of the present invention; Figure 7 It is a partial axial view of the front half of the transverse loading system of the present invention; Figure 8 It is an axial view of the rear half of the transverse loading system of the present invention; Fig. 9 It is a partial axial view of the rear half of the transverse loading system of the present invention; Fig.10 The overall axial view of the lateral loading system in the present invention Figure 1 ; Fig.11 It is a partial axial view of the front half of the side loading system of the present invention; Fig.12 The overall axial view of the lateral loading system in the present invention Figure 2 ; Fig.13 It is a partial axial view of the rear half of the lateral loading system of the present invention; Fig.14 For the embodiment of the present invention Figure 1 ; Fig.15 For the embodiment of the present invention Figure 2 .

[0014] In the figure: 1 - test base, 2 - test piece platform, 3 - load loading system, 4 - test piece base, 5 - first beam of test piece, 6 - second beam of test piece, 7 - second beam of test piece, 8 - fourth beam of test piece, 9 - first beam motion mechanism of test piece, 10 - second beam motion mechanism of test piece, 11 - second beam motion mechanism of test piece, 12 - fourth beam motion mechanism of test piece, 13 - fifth beam motion mechanism of test piece, 14 - sixth beam motion mechanism of test piece, 15 - seventh beam motion mechanism of test piece, 16 - eighth beam motion mechanism of test piece, 17 - first rack of test piece platform, 18 - second rack of test piece platform, 19 - first guide rail of test piece platform, 20 - second guide rail of test piece platform, 21 - Servo motor, 22-gear, 23-slider, 24-T-plate, 25-hand-cranked screw lift, 26-lateral loading system, 27-lateral loading system, 28-first vertical beam, 29-second vertical beam, 30-third vertical beam, 31-fourth vertical beam, 32-first horizontal beam, 33-first fixed horizontal beam, 34-second horizontal beam, 35-second fixed horizontal beam, 36-first horizontal guide rail, 37-second horizontal guide rail, 38-third horizontal guide rail, 39-fourth horizontal guide rail, 40-fifth horizontal guide rail, 41-sixth horizontal guide rail, 42-seventh horizontal guide rail, 43-eighth horizontal guide rail, 44-first horizontal slider, 45-second horizontal slider, 46-third horizontal slider, 47-fourth horizontal slider, 48-first T-shaped plate, 49-second T-shaped plate, 50-third T-shaped plate, 51-fourth T-shaped plate, 52-first transverse rack, 53-second transverse rack, 54-first transverse servo motor, 55-second transverse servo motor, 56-third transverse servo motor, 57-fourth transverse servo motor, 58-first transverse gear, 59-second transverse gear, 60-third transverse gear, 61-fourth transverse gear, 62-first transverse actuator, 63-second transverse actuator, 64-third transverse actuator, 65-fourth transverse actuator, 66-first transverse actuator clamp, 67-second transverse actuator clamp, 68-third transverse actuator clamp, 69-fourth transverse actuator clamp, 70-first transverse screw linkage lift , 71 - transverse second screw linkage lifter, 72 - first side beam, 73 - first fixed side beam, 74 - second side beam, 75 - second fixed side beam, 76 - first lateral guide rail, 77 - second lateral guide rail, 78 - third lateral guide rail, 79 - fourth lateral guide rail, 80 - fifth lateral guide rail, 81 - sixth lateral guide rail, 82 - seventh lateral guide rail, 83 - eighth lateral guide rail, 84 - first lateral slider, 85 - second lateral slider, 86 - third lateral slider, 87 - fourth lateral slider, 88 - first lateral rack, 89 - second lateral rack, 90 - first lateral servo motor, 91 - second lateral servo motor, 92 - third lateral servo motor, 93 - fourth lateral servo motor, 94 - first lateral gear,95-lateral second gear, 96-lateral third gear, 97-lateral fourth gear, 98-lateral first actuator, 99-lateral second actuator, 100-lateral third actuator, 101-lateral fourth actuator, 102-lateral first actuator clamp, 103-lateral second actuator clamp, 104-lateral third actuator clamp, 105-lateral fourth actuator clamp, 106-lateral first screw rod linkage lifter, 107-lateral second screw rod linkage lifter. DETAILED DESCRIPTION

[0015] In order to clearly illustrate the technical features of this patent, this patent is elaborated in detail below through a specific implementation method and in combination with its accompanying drawings.

[0016] like Figure 1 As shown, the present invention discloses a structural load-bearing test platform suitable for multiple types of landing gears and multiple working conditions, including a test base 1, a test piece platform 2 and a load loading system 3.

[0017] like Figure 2 As shown, the test base 1 is an integral forging, or it can be forged and welded in multiple pieces. One side has T-shaped grooves vertically cross-distributed and is thinner, while the other side has a cross grid structure and is thicker, which can ensure the overall rigidity of the test base. The cross grid surface structure faces downward and the T-shaped groove surface faces upward.

[0018] like Figure 3 As shown, the test piece platform 2 is fixed in the middle of the test base 1 by bolts; the test piece platform 2 includes a test piece base 4, a first beam 5 of the test piece, a second beam 6 of the test piece, a second beam 7 of the test piece, a fourth beam 8 of the test piece, a first beam motion mechanism 9 of the test piece, a second beam motion mechanism 10 of the test piece, a second beam motion mechanism 11 of the test piece, a fourth beam motion mechanism 12 of the test piece, a fifth beam motion mechanism 13 of the test piece, a sixth beam motion mechanism 14 of the test piece, a seventh beam motion mechanism 15 of the test piece, an eighth beam motion mechanism 16 of the test piece, a first rack 17 of the test piece platform, a second rack 18 of the test piece platform, a first guide rail 19 of the test piece platform, and a second guide rail 20 of the test piece.

[0019] like Figure 3 As shown, the test piece base 4 is fixed in the middle of the test base 1 by bolts, and the test piece base 4 is plane-distributed with T-shaped grooves arranged in parallel in the transverse direction.

[0020] like Figure 3As shown, the first crossbeam 5, the second crossbeam 6, the second crossbeam 7 and the fourth crossbeam 8 of the test piece are placed in parallel on the test piece base 4 in sequence, perpendicular to the T-shaped groove; the upper plane of the test piece crossbeams has two rows of parallel rectangular grooves, each row of rectangular grooves has seven bolt holes penetrating the crossbeams, the bolt holes are located just above the T-shaped grooves of the test piece base, and the test piece crossbeams can be guided by bolts.

[0021] like Figure 3 As shown, the first test piece platform rack 17 and the second test piece platform rack 18 are parallelly distributed on both sides of the test piece base 4, with the toothed side facing outwards.

[0022] like Figure 3 As shown, the first guide rail 19 of the test piece platform and the second guide rail 20 of the test piece platform are respectively fixed to the two ends of the test piece base 4 by bolts, parallel to the rack and close to the inside.

[0023] like Figure 3 As shown, the first beam motion mechanism 9 and the second beam motion mechanism 10 of the test piece are respectively fixed at the two ends of the first beam 5 of the test piece; the second beam motion mechanism 11 and the fourth beam motion mechanism 12 of the test piece are respectively fixed at the two ends of the second beam 6 of the test piece; the fifth beam motion mechanism 13 and the sixth beam motion mechanism 14 of the test piece are respectively fixed at the two ends of the second beam 7 of the test piece; the seventh beam motion mechanism 15 and the eighth beam motion mechanism 16 of the test piece are respectively fixed at the two ends of the fourth beam 8 of the test piece.

[0024] like Figure 4 As shown, the first beam motion mechanism 9 of the test piece, the second beam motion mechanism 10 of the test piece, the second beam motion mechanism 11 of the test piece, the fourth beam motion mechanism 12 of the test piece, the fifth beam motion mechanism 13 of the test piece, the sixth beam motion mechanism 14 of the test piece, the seventh beam motion mechanism 15 of the test piece, and the eighth beam motion mechanism 16 of the test piece have the same structure, and each motion mechanism includes a servo motor 21, a gear 22, a slider 23, a T-shaped plate 24, and a hand-cranked screw lift 25; the head of the T-shaped plate 24 is welded to one end of the beam; the servo motor 21 is fixedly connected to the lower end of the web of the T-shaped plate 24 by bolts, and the rotating shaft passes through It is fixedly connected to the gear 22 through the T-shaped plate; the middle of the gear 22 is fixedly connected to the servo motor shaft, and the outer end is meshed with the rack 17; the slider 23 is located directly below the hand-cranked screw lift 25, meshes with the guide rail 19, and can slide along the direction of the guide rail; the hand-cranked screw lift 25 includes two lift modules, which are fixed to the web of the T-shaped plate by bolts. By rotating the turntable, the screw can be controlled to move downward through the web of the T-shaped plate and press against the slider 23 to raise the test piece beam by a small amount, but the gear and rack are not separated, so that when the test piece beam is moved laterally, it does not rub against the test piece base 4, which is conducive to lateral movement.

[0025] like Figure 1 As shown, the load loading system 3 is symmetrically distributed in the transverse and lateral directions, and includes a transverse loading system 26 and a lateral loading system 27 .

[0026] like Figure 5 , 6 As shown in Figure 7, the transverse loading system 26 includes a first vertical beam 28, a second vertical beam 29, a third vertical beam 30, a fourth vertical beam 31, a first cross beam 32, a first fixed cross beam 33, a second cross beam 34, a second fixed cross beam 35, a first transverse guide rail 36, a second transverse guide rail 37, a third transverse guide rail 38, a fourth transverse guide rail 39, a fifth transverse guide rail 40, a sixth transverse guide rail 41, a seventh transverse guide rail 42, a eighth transverse guide rail 43, a first transverse slider 44, a second transverse slider 45, a third transverse slider 46, a fourth transverse slider 47, a first T-shaped plate 48, a second T-shaped plate 49, a third T-shaped plate 50, and a fourth T-shaped plate 51. 1. a first transverse rack 52, a second transverse rack 53, a first transverse servo motor 54, a second transverse servo motor 55, a third transverse servo motor 56, a fourth transverse servo motor 57, a first transverse gear 58, a second transverse gear 59, a third transverse gear 60, a fourth transverse gear 61, a first transverse actuator 62, a second transverse actuator 63, a third transverse actuator 64, a fourth transverse actuator 65, a first transverse actuator clamp 66, a second transverse actuator clamp 67, a third transverse actuator clamp 68, a fourth transverse actuator clamp 69, a first transverse screw linkage lift 70, and a second transverse screw linkage lift 71.

[0027] like Figure 5 As shown, the first vertical beam 28, the second vertical beam 29, the third vertical beam 30, and the fourth vertical beam 31 are respectively located at the four corners of the test bench base, and are fixed to the test bench base 1 by bolts. The vertical beam bases are provided with tripods in the horizontal and lateral directions to ensure sufficient bending moment strength.

[0028] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse guide rail 36, the second transverse guide rail 37, the third transverse guide rail 38 and the fourth transverse guide rail 39 are respectively fixed to the inner center lines of the first vertical beam 28, the second vertical beam 29, the third vertical beam 30 and the fourth vertical beam 31 by bolts.

[0029] like Figure 6 , 7 As shown in FIGS. 8 and 9 , the first transverse slider 44 , the second transverse slider 45 , the third transverse slider 46 , and the fourth transverse slider 47 are respectively engaged with the first transverse guide rail 36 , the second transverse guide rail 37 , the third transverse guide rail 38 , and the fourth transverse guide rail 39 .

[0030] like Figure 6 , 7 As shown in FIGS. 8 and 9 , the first T-shaped plate 48 , the second T-shaped plate 49 , the third T-shaped plate 50 , and the fourth T-shaped plate 51 are respectively fixed at their webs to the first transverse slider 44 , the second transverse slider 45 , the third transverse slider 46 , and the fourth slider 47 by bolts.

[0031] like Figure 6 , 7 As shown in , 8 and 9, one end of the first cross beam 32 is connected to the head of the first T-shaped plate 48 by bolts, and the other end is connected to the head of the second T-shaped plate 49 by bolts; both ends of the first fixed cross beam 33 are respectively fixed to the first vertical beam 28 and the second vertical beam 29 by bolts, and both ends protrude slightly; one end of the second cross beam 34 is connected to the head of the third T-shaped plate 50 by bolts, and the other end is connected to the head of the fourth T-shaped plate 51 by bolts; both ends of the second fixed cross beam 35 are respectively fixed to the third vertical beam 30 and the fourth vertical beam 31 by bolts, and both ends protrude slightly.

[0032] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse screw-linked elevator 70 is fixed on the lower surface of the first beam 32, and the screws at both ends pass through the first beam 32 and are fixed on the first fixed beam 33; the second transverse screw-linked elevator 71 is fixed on the lower surface of the second beam 34, and the screws at both ends pass through the second beam 34 and are fixed on the second fixed beam 35.

[0033] like Figure 6 , 7 As shown in Figures 8 and 9, the fifth transverse guide rail 40 and the sixth transverse guide rail 41 are fixed on the inner side of the first crossbeam 32, and are symmetrically distributed in parallel along the inner center line of the first crossbeam; the seventh transverse guide rail 42 and the eighth transverse guide rail 43 are fixed on the inner side of the second crossbeam 34, and are symmetrically distributed in parallel along the inner center line of the second crossbeam.

[0034] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse rack 52 is fixed on the inner side of the first crossbeam 32, located slightly below the middle of the fifth guide rail 40 and the sixth guide rail 41, and parallel thereto; the second transverse rack 53 is fixed on the inner side of the second crossbeam 34, located slightly below the middle of the seventh guide rail 42 and the eighth guide rail 43, and parallel thereto.

[0035] like Figure 6 , 7As shown in Figures 8 and 9, the first transverse actuator cylinder clamp 66 and the second transverse actuator cylinder clamp 67 are both engaged with the fifth transverse guide rail 40 and the sixth transverse guide rail 41, and can slide along the direction of the fifth transverse guide rail 40 and the sixth transverse guide rail 41, and are distributed left and right; the third transverse actuator cylinder clamp 68 and the fourth transverse actuator cylinder clamp 69 are both engaged with the seventh transverse guide rail 42 and the eighth transverse guide rail 43, and can slide along the direction of the seventh transverse guide rail 42 and the eighth transverse guide rail 43, and are distributed left and right.

[0036] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse servo motor 54, the second transverse servo motor 55, the third transverse servo motor 56 and the fourth transverse servo motor 57 are respectively fixed on the side small plates of the first transverse actuator cylinder clamp 66, the second transverse actuator cylinder clamp 67, the third transverse actuator cylinder clamp 68 and the fourth transverse actuator cylinder clamp 69, and their rotating shafts pass through the small plates.

[0037] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse gear 58, the second transverse gear 59, the third transverse gear 60 and the fourth transverse gear 61 are respectively fixed on the rotating shafts of the first transverse servo motor 54, the second transverse servo motor 55, the third transverse servo motor 56 and the fourth transverse servo motor 57. The first transverse gear 58 and the second transverse gear 59 are meshed with the first transverse rack 52, and the third transverse gear 60 and the fourth transverse gear 61 are meshed with the second transverse rack 53.

[0038] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse actuator 62, the second transverse actuator 63, the third transverse actuator 64 and the fourth transverse actuator 65 are respectively fixed on the first transverse actuator clamp 66, the second transverse actuator clamp 67, the third transverse actuator clamp 68 and the fourth transverse actuator clamp 69 by bolts.

[0039] like Fig.10 , 11As shown in Figures 12 and 13, the lateral loading system 27 includes a first side beam 72, a first fixed side beam 73, a second side beam 74, a second fixed side beam 75, a first lateral guide rail 76, a second lateral guide rail 77, a third lateral guide rail 78, a fourth lateral guide rail 79, a fifth lateral guide rail 80, a sixth lateral guide rail 81, a seventh lateral guide rail 82, an eighth lateral guide rail 83, a first lateral slider 84, a second lateral slider 85, a third lateral slider 86, a fourth lateral slider 87, a first lateral rack 88, a second lateral rack 89, a first lateral servo motor 90, and a side The second lateral servo motor 91, the third lateral servo motor 92, the fourth lateral servo motor 93, the first lateral gear 94, the second lateral gear 95, the third lateral gear 96, the fourth lateral gear 97, the first lateral actuator 98, the second lateral actuator 99, the third lateral actuator 100, the fourth lateral actuator 101, the first lateral actuator clamp 102, the second lateral actuator clamp 103, the third lateral actuator clamp 104, the fourth lateral actuator clamp 105, the first lateral screw linkage lift 106, and the second lateral screw linkage lift 107.

[0040] like Fig.10 , 11 As shown in FIGS. 12 and 13 , the first lateral guide rail 76 , the second lateral guide rail 77 , the third lateral guide rail 78 , and the fourth lateral guide rail 79 are respectively fixed to the outer center lines of the first vertical beam 28 , the second vertical beam 29 , the third vertical beam 30 , and the fourth vertical beam 31 by bolts.

[0041] like Fig.10 , 11 As shown in FIGS. 12 and 13 , the first lateral slider 84 , the second lateral slider 85 , the third lateral slider 86 , and the fourth lateral slider 87 are respectively engaged with the first lateral guide rail 76 , the second lateral guide rail 77 , the third lateral guide rail 78 , and the fourth lateral guide rail 79 ; like Fig.10 , 11 As shown in , 12 and 13, one end of the first side beam 72 is connected to the first lateral slider 84 by bolts, and the other end is connected to the second lateral slider 85 by bolts; the two ends of the first fixed side beam 73 are respectively fixed to the inner tops of the first vertical beam 28 and the third vertical beam 30 by bolts; one end of the second side beam 74 is connected to the third lateral slider 86 by bolts, and the other end is connected to the fourth lateral slider 87 by bolts; the two ends of the second fixed side beam 75 are respectively fixed to the inner tops of the second vertical beam 29 and the fourth vertical beam 31 by bolts; like Fig.10 , 11As shown in FIGS. 12 and 13 , the first lateral screw rod linkage lifter 106 is fixed on the lower surface of the first side beam 72, and the screw rods at both ends pass through the first side beam 72 and are respectively fixed to the first fixed beam 33 and one end of the second fixed beam 35; the second lateral screw rod linkage lifter 107 is fixed on the lower surface of the second side beam 74, and the screw rods at both ends pass through the second side beam 74 and are respectively fixed to the other ends of the first fixed beam 33 and the second fixed beam 35; like Fig.10 , 11 As shown in , 12 and 13, the fifth lateral guide rail 80 and the sixth lateral guide rail 81 are fixed to the inner side of the first side beam 72, and are symmetrically and parallelly distributed along the inner center line of the first side beam 72; the seventh lateral guide rail 82 and the eighth lateral guide rail 83 are fixed to the inner side of the second side beam 75, and are symmetrically and parallelly distributed along the inner center line of the second side beam 75; like Fig.10 , 11 As shown in FIGS. 12 and 13 , the first lateral rack 88 is fixed to the inner side of the first side beam 72 , and is located in the middle and lower part of the fifth lateral guide rail 80 and the sixth lateral guide rail 81 , and is parallel thereto; the second lateral rack 89 is fixed to the inner side of the second side beam 74 , and is located in the middle and lower part of the seventh lateral guide rail 82 and the eighth lateral guide rail 83 , and is parallel thereto; like Fig.10 , 11 As shown in FIGS. 12 and 13, the first lateral actuating cylinder clamp 102 and the second lateral actuating cylinder clamp 103 are both engaged with the fifth lateral guide rail 80 and the sixth lateral guide rail 81, and can slide along the fifth lateral guide rail and the sixth lateral guide rail, and are distributed left and right; the third lateral actuating cylinder clamp 104 and the fourth lateral actuating cylinder clamp 105 are both engaged with the seventh lateral guide rail 82 and the eighth lateral guide rail 83, and can slide along the seventh lateral guide rail 82 and the eighth lateral guide rail 83, and are distributed left and right; like Fig.10 , 11 As shown in 12 and 13, the first lateral servo motor 90, the second lateral servo motor 91, the third lateral servo motor 92 and the fourth lateral servo motor 93 are respectively fixed on the side small plates of the first lateral actuating cylinder clamp 102, the second lateral actuating cylinder clamp 103, the third lateral actuating cylinder clamp 104 and the fourth lateral actuating cylinder clamp 105, and their rotating shafts pass through the small plates; like Fig.10 , 11As shown in FIGS. 12 and 13 , the first lateral gear 94, the second lateral gear 95, the third lateral gear 96 and the fourth lateral gear 97 are respectively fixed on the rotating shafts of the first lateral servo motor 90, the second lateral servo motor 91, the third lateral servo motor 92 and the fourth lateral servo motor 93. The first lateral gear 94 and the second lateral gear 95 are meshed with the first lateral rack 88, and the third lateral gear 96 and the fourth lateral gear 97 are meshed with the second lateral rack 89; like Fig.10 , 11 As shown in Figures 12 and 13, the first lateral actuator 98, the second lateral actuator 99, the third lateral actuator 100 and the fourth lateral actuator 101 are respectively fixed to the first lateral actuator clamp 102, the second lateral actuator clamp 103, the third lateral actuator clamp 104 and the fourth lateral actuator clamp 105 by bolts.

[0042] There are many specific implementation ways of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A universal landing gear structure load-bearing test device, characterized in that: The structural load-bearing test device comprises a test base (1), a test piece platform (2) and a load loading system (3); The test piece platform (2) comprises a test piece base (4), a plurality of test piece crossbeams, and a test piece crossbeam motion mechanism installed at both ends of the test piece crossbeams, and the landing frame to be tested is carried by the plurality of test piece crossbeams; The test piece base (4) is fixed in the middle of the test base (1) by means of bolts, and a first test piece platform rack (17), a second test piece platform rack (18), a first test piece platform guide rail (19) and a second test piece guide rail (20) which are parallel to each other are also fixedly mounted on the test piece base (4); A plurality of test piece crossbeams are all perpendicular to the first rack (17) of the test piece platform; the test piece crossbeam motion mechanism comprises a servo motor (21), a gear (22) and a T-shaped plate (24); the T-shaped plate (24) is slidably connected to the first guide rail (19) of the test piece platform or the second guide rail (20) of the test piece; the servo motor (21) is fixedly mounted on the T-shaped plate (24); the gear (22) is fixedly connected to the output shaft of the servo motor (21) and is kept in mesh with the first rack (17) of the test piece platform or the second rack (18) of the test piece platform; the test piece crossbeam is driven to translate by the servo motor (21); The load loading system (3) comprises a plurality of vertical beams surrounding the test piece platform (2) and a transverse loading system (26) and a lateral loading system (27) installed on the vertical beams, wherein the vertical beams are arranged along the Z direction and their bottom ends are fixedly connected to the test base (1); The transverse loading system (26) is symmetrically provided with a pair of transverse loading systems (26) with the test piece platform (2) as the center, and includes a transverse beam arranged along the X direction and a transverse actuator installed on the transverse beam, wherein the transverse beam is installed on the vertical beam in a liftable manner, and the transverse actuator is arranged along the Y direction and is used to apply a Y-direction force to the landing gear to be tested; The lateral loading system (27) is symmetrically provided with a pair of side beams arranged along the Y direction and a lateral actuator installed on the side beams. The side beams are installed on the vertical beams in a manner that they can be raised or lowered. The lateral actuators are arranged along the X direction and are used to apply an X-direction force to the landing gear to be tested.

2. A universal landing gear structure load-bearing test device according to claim 1, characterized in that: The test piece crossbeam motion mechanism further comprises a slider (23) and a hand-cranked screw lift (25), wherein the slider (23) is slidably mounted on a first guide rail (19) of the test piece platform or a second guide rail (20) of the test piece, and the hand-cranked screw lift (25) is fixedly mounted on a T-shaped plate (24) and connected to the slider (23), and the T-shaped plate (24) is lifted by the hand-cranked screw lift (25).

3. A universal landing gear structure load-bearing test device according to claim 1, characterized in that: A fixed crossbeam is also fixedly mounted on the top of the vertical beam, and the fixed crossbeam is arranged above the crossbeam along the X direction, and its end extends outward; The transverse loading system (26) further comprises a transverse screw linkage lift arranged along the Z direction, wherein a housing of the transverse screw linkage lift is fixedly mounted on the crossbeam, and a screw top end of the transverse screw linkage lift is fixedly connected to the fixed crossbeam, and the crossbeam is driven to reciprocate and lift along the Z direction by the transverse screw linkage lift; The lateral loading system (27) further comprises a lateral screw-linked elevator arranged along the Z direction, wherein a housing of the lateral screw-linked elevator is fixedly mounted on the side beam, and a screw top end of the lateral screw-linked elevator is fixedly connected to a fixed crossbeam, and the side beam is driven to reciprocate and rise and fall along the Z direction via the lateral screw-linked elevator.

4. A universal landing gear structure load-bearing test device according to claim 1, characterized in that: A transverse actuating cylinder fixture is slidably mounted on the crossbeam, and the root of the transverse actuating cylinder is fixedly mounted on the transverse actuating cylinder fixture; The crossbeam is also fixedly mounted with a transverse rack arranged along the X direction, and the transverse actuator clamp is fixedly mounted with a transverse servo motor, and the output shaft of the transverse servo motor is fixedly mounted with a transverse gear meshing with the transverse rack; the transverse actuator is driven to reciprocate along the X direction by the transverse servo motor.

5. A universal landing gear structure load-bearing test device according to claim 1, characterized in that: A lateral actuating cylinder fixture is slidably mounted on the side beam, and a root of the lateral actuating cylinder is fixedly mounted on the lateral actuating cylinder fixture; The side beam is also fixedly mounted with a lateral rack arranged along the Y direction, and the lateral actuator clamp is fixedly mounted with a lateral servo motor, and the output shaft of the lateral servo motor is fixedly mounted with a lateral gear meshing with the lateral rack; the lateral actuator is driven by the lateral servo motor to reciprocate along the Y direction.

6. A universal landing gear structure load-bearing test device according to any one of claims 1 to 5, characterized in that: The test piece platform (2) has four test piece crossbeams; each crossbeam in the transverse loading system (26) is provided with two transverse actuators, and each side beam in the lateral loading system (27) is provided with two lateral actuators.

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