A universal landing shelf structure load-bearing test device

Abstract

This invention discloses a universal landing gear structural load-bearing testing device, relating to the field of landing gear structural load-bearing technology. It is applicable to testing landing gear of various sizes and specifications, greatly facilitating multi-condition structural load-bearing testing of landing gear. The structural load-bearing testing device includes a test base, a test piece platform, and a load loading system. The test piece platform includes a test piece base, multiple test piece crossbeams, and test piece crossbeam motion mechanisms installed at both ends of the crossbeams, supporting the landing gear under test through the multiple crossbeams. The lateral actuator is arranged along the Y-axis to apply a Y-axis force to the landing gear under test; the side actuator is arranged along the X-axis to apply an X-axis force to the landing gear under test. This invention incorporates motion and adjustment mechanisms in each direction, allowing for convenient adjustment of the spatial position of the actuators in each direction to adapt to different types of landing gear, saving testing costs, time, and manpower.

Description

Technical Field

[0001] This invention relates to the field of landing shelf structure bearing technology, and more specifically to a universal landing shelf structure bearing test device. Background Technology

[0002] As the main load-bearing component of an aircraft during landing, the performance of the landing gear directly affects the use and safety of the aircraft. Therefore, it is essential to study the structural load-bearing strength of the landing gear in order to ensure the safe use of the aircraft.

[0003] However, aircraft come in a wide variety of types, and so do their landing gear. Landing gears can be categorized by structure, such as strut landing gear and rocker arm landing gear; and by the number of wheels, such as single-wheel landing gear, dual-wheel landing gear, and multi-wheel landing gear. Previously, a dedicated test bench was often required to conduct structural load tests on a single type of landing gear. Furthermore, the same landing gear can operate under various load conditions, necessitating multiple adjustments to the landing gear and actuator positions. Traditional fixed test benches consumed significant financial and human resources. Therefore, there is an urgent need for a structural load testing platform suitable for various landing gear types and operating conditions. Summary of the Invention

[0004] To address the above problems, this invention proposes a universal landing shelf structural load-bearing test device, which can be applied to the testing of landing shelves of various sizes and specifications, greatly facilitating the structural load-bearing test of landing shelves under multiple working conditions.

[0005] The technical solution of the present invention is as follows: the structural bearing test device includes a test base 1, a test piece platform 2, and a load loading system 3;

[0006] The test platform 2 includes a test base 4, multiple test beams, and a test beam motion mechanism installed at both ends of the test beams, which supports the lander to be tested through the multiple test beams;

[0007] The test specimen base 4 is fixed to the middle of the test base 1 by bolts. The test specimen base 4 is also fixedly installed with a first rack 17, a second rack 18, a first guide rail 19, and a second guide rail 20 of the test specimen platform that are parallel to each other.

[0008] Multiple test beams are perpendicular to the first rack 17 of the test platform. The test 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 or the second guide rail 20 of the test platform. The servo motor 21 is fixedly mounted on the T-shaped plate 24, and the gear 22 is fixedly connected to the output shaft of the servo motor 21 and meshes with the first rack 17 or the second rack 18 of the test platform. The test beams are moved horizontally by the servo motor 21.

[0009] The load loading system 3 includes multiple vertical beams surrounding the test platform 2, as well as 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 their bottom ends are fixedly connected to the test base 1.

[0010] The lateral loading system 26 is provided in pairs symmetrically with the test platform 2 as the center. It includes a crossbeam arranged along the X direction and a lateral actuating cylinder installed on the crossbeam. The crossbeam is mounted on the vertical beam in a liftable manner. The lateral actuating cylinder is arranged along the Y direction and is used to apply a Y-direction force to the lander under test.

[0011] The lateral loading system 27 is provided in pairs symmetrically with the test platform 2 as the center. It includes a side beam arranged along the Y direction and a lateral actuator cylinder installed on the side beam. The side beam is mounted on the vertical beam in a liftable manner. The lateral actuator cylinder is arranged along the X direction and is used to apply an X-direction force to the lander under test.

[0012] Furthermore, the test piece beam motion mechanism also includes a slider 23 and a hand-cranked screw jack 25. The slider 23 is slidably mounted on the first guide rail 19 or the second guide rail 20 of the test piece platform. The hand-cranked screw jack 25 is fixedly mounted on the T-shaped plate 24 and connected to the slider 23, thereby lifting the T-shaped plate 24.

[0013] Furthermore, a fixed crossbeam is also fixedly installed at the top of the vertical beam. The fixed crossbeam is arranged above the crossbeam along the X direction, and its end extends outward.

[0014] The lateral loading system 26 also includes a lateral screw linkage lifting machine arranged along the Z direction. The housing of the lateral screw linkage lifting machine is fixedly installed on the crossbeam, and the top end of the screw of the lateral screw linkage lifting machine is fixedly connected to the fixed crossbeam. The lateral screw linkage lifting machine drives the crossbeam to reciprocate up and down along the Z direction.

[0015] The lateral loading system 27 also includes a lateral screw linkage lifting machine arranged along the Z direction. The housing of the lateral screw linkage lifting machine is fixedly installed on the side beam, and the top end of the screw of the lateral screw linkage lifting machine is fixedly connected to the fixed cross beam. The lateral screw linkage lifting machine drives the side beam to reciprocate up and down along the Z direction.

[0016] Furthermore, a transverse actuator clamp is slidably mounted on the crossbeam, and the root of the transverse actuator is fixedly mounted on the transverse actuator clamp.

[0017] The crossbeam is also fixedly mounted with a transverse rack arranged along the X direction, and a transverse servo motor is fixedly mounted on the transverse actuating cylinder clamp. A transverse gear that meshes with the transverse rack is fixedly mounted on the output shaft of the transverse servo motor; the transverse servo motor drives the transverse actuating cylinder to reciprocate and translate along the X direction.

[0018] Furthermore, a lateral actuator clamp is slidably mounted on the side beam, and the root of the lateral actuator is fixedly mounted on the lateral actuator clamp;

[0019] The side beam is also fixedly mounted with a lateral rack arranged along the Y direction, and a lateral servo motor is fixedly mounted on the lateral actuating cylinder clamp. A lateral gear that meshes with the lateral rack is fixedly mounted on the output shaft of the lateral servo motor; the lateral actuating cylinder is driven to reciprocate and translate along the Y direction by the lateral servo motor.

[0020] Furthermore, the test piece platform 2 has four test piece crossbeams; each crossbeam in the transverse loading system 26 is provided with two transverse actuating cylinders, and each side beam in the lateral loading system 27 is provided with two lateral actuating cylinders.

[0021] Considering that different types of landing gear, such as two-wheeled and four-wheeled landing gear, require different test benches, and that manual adjustment of the height of actuators in various directions is usually necessary during testing under different operating conditions, which consumes a significant amount of time and manpower, this design incorporates directional motion and adjustment mechanisms. This allows for convenient adjustment of the spatial position of actuators in various directions to accommodate different types of landing gear, saving testing costs, time, and manpower.

[0022] Compared with existing technologies, this case has the following technical advantages:

[0023] I. This invention allows for free adjustment of the position of the test piece's crossbeam to achieve free adjustment of the landing gear's lateral position;

[0024] II. This invention allows for the selection of different numbers of crossbeams in the test specimen to accommodate landing gears of different sizes and weights;

[0025] Third, the present invention can freely adjust the spatial position of the actuator to meet the loading requirements of different spatial loading point positions under different working conditions of different types of landing gear. Attached Figure Description

[0026] Figure 1 This is a three-dimensional overall structural axis view of the present invention;

[0027] Figure 2 These are axial views of the upper and lower surfaces of the test base in this invention;

[0028] Figure 3 This is a three-dimensional structural axis view of the test piece platform in this invention;

[0029] Figure 4 This is an axial view of the crossbeam motion mechanism of the test piece in this invention;

[0030] Figure 5 This is an overall axial view of the lateral loading system in this invention;

[0031] Figure 6 This is an axial view of the front half of the transverse loading system in this invention;

[0032] Figure 7 This is a partial axial view of the front half of the transverse loading system in this invention;

[0033] Figure 8 This is an axial view of the rear half of the transverse loading system in this invention;

[0034] Figure 9 This is a partial axial view of the rear half of the transverse loading system in this invention;

[0035] Figure 10 This is the overall axis view of the lateral loading system in this invention. Figure 1 ;

[0036] Figure 11 This is a partial axial view of the front half of the lateral loading system in this invention;

[0037] Figure 12 This is the overall axis view of the lateral loading system in this invention. Figure 2 ;

[0038] Figure 13 This is a partial axial view of the rear half of the lateral loading system in this invention;

[0039] Figure 14 This is a schematic diagram of an embodiment of the present invention. Figure 1 ;

[0040] Figure 15 This is a schematic diagram of an embodiment of the present invention. Figure 2 .

[0041] In the diagram: 1 - Test base, 2 - Test platform, 3 - Loading system, 4 - Test base, 5 - First crossbeam of the test piece, 6 - Second crossbeam of the test piece, 7 - Second crossbeam of the test piece, 8 - Fourth crossbeam of the test piece, 9 - First crossbeam motion mechanism of the test piece, 10 - Second crossbeam motion mechanism of the test piece, 11 - Second crossbeam motion mechanism of the test piece, 12 - Fourth crossbeam motion mechanism of the test piece, 13 - Fifth crossbeam motion mechanism of the test piece, 14 - Sixth crossbeam motion mechanism of the test piece, 15 - Seventh crossbeam motion mechanism of the test piece, 16 - Eighth crossbeam motion mechanism of the test piece, 17 - First rack of the test platform, 18 - Second rack of the test platform, 19 - First guide rail of the test platform, 20 - Second guide rail of the test platform, 21 - Servo motor, 22 - Gear, 23 - Slider, 24 - T-plate, 25 - Hand-cranked screw jack, 26 - Lateral loading system, 27 - Side 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 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 lifting machine 71 - Horizontal second screw-driven lifting mechanism; 72 - First side beam; 73 - First fixed side beam; 74 - Second side beam; 75 - Second fixed side beam; 76 - Lateral first guide rail; 77 - Lateral second guide rail; 78 - Lateral third guide rail; 79 - Lateral fourth guide rail; 80 - Lateral fifth guide rail; 81 - Lateral sixth guide rail; 82 - Lateral seventh guide rail; 83 - Lateral eighth guide rail; 84 - Lateral first slider; 85 - Lateral second slider; 86 - Lateral third slider; 87 - Lateral fourth slider; 88 - Lateral first rack; 89 - Lateral second rack; 90 - Lateral first servo motor; 91 - Lateral second servo motor; 92 - Lateral third servo motor; 93 - Lateral fourth servo motor; 94 - Lateral first 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 linkage jack, 107 - Lateral second screw linkage jack. Detailed Implementation

[0042] To clearly illustrate the technical features of this patent, the following detailed description is provided through specific embodiments and in conjunction with the accompanying drawings.

[0043] like Figure 1 As shown, the present invention discloses a structural load-bearing test platform applicable to multiple types of landing gear under multiple working conditions, including a test base 1, a test piece platform 2, and a load loading system 3.

[0044] like Figure 2 As shown, the test base 1 is an integral forging, or it can be forged and welded from multiple pieces. One side has vertically intersecting T-shaped grooves and is relatively thin, while the other side has a cross-grid structure and is relatively thick, which can ensure the overall rigidity of the test base. The cross-grid surface faces downward and the T-shaped groove surface faces upward.

[0045] like Figure 3 As shown, the test piece platform 2 is fixed to the middle of the test base 1 by bolts; the test piece platform 2 includes a test piece base 4, a first crossbeam 5, a second crossbeam 6, a second crossbeam 7, a fourth crossbeam 8, a first crossbeam motion mechanism 9, a second crossbeam motion mechanism 10, a second crossbeam motion mechanism 11, a fourth crossbeam motion mechanism 12, a fifth crossbeam motion mechanism 13, a sixth crossbeam motion mechanism 14, a seventh crossbeam motion mechanism 15, an eighth crossbeam motion mechanism 16, a first rack 17, a second rack 18, a first guide rail 19, and a second guide rail 20.

[0046] like Figure 3 As shown, the test specimen base 4 is fixed to the middle of the test base 1 by bolts, and the test specimen base 4 has T-shaped grooves arranged in parallel horizontally on its upper plane.

[0047] like Figure 3As shown, the first crossbeam 5, the second crossbeam 6, the second crossbeam 7, and the fourth crossbeam 8 of the test specimen are placed parallel to each other on the test specimen base 4, perpendicular to the T-shaped groove. The upper surface of the test specimen crossbeam has two rows of parallel rectangular grooves, and each row of rectangular grooves has seven bolt holes that penetrate the crossbeam. The bolt holes are located directly above the T-shaped groove of the test specimen base, and the test specimen crossbeam can be guided by bolts.

[0048] like Figure 3 As shown, the first rack 17 and the second rack 18 of the test piece platform are distributed in parallel on both sides of the test piece base 4, with the toothed side facing outward.

[0049] like Figure 3 As shown, the first guide rail 19 and the second guide rail 20 of the test piece platform are fixed to both ends of the test piece base 4 by bolts, parallel to the rack and located inward.

[0050] like Figure 3 As shown, the first crossbeam motion mechanism 9 and the second crossbeam motion mechanism 10 of the test piece are respectively fixed at both ends of the first crossbeam 5 of the test piece; the second crossbeam motion mechanism 11 and the fourth crossbeam motion mechanism 12 of the test piece are respectively fixed at both ends of the second crossbeam 6 of the test piece; the fifth crossbeam motion mechanism 13 and the sixth crossbeam motion mechanism 14 of the test piece are respectively fixed at both ends of the second crossbeam 7 of the test piece; and the seventh crossbeam motion mechanism 15 and the eighth crossbeam motion mechanism 16 of the test piece are respectively fixed at both ends of the fourth crossbeam 8 of the test piece.

[0051] like Figure 4 As shown, the motion mechanisms 9, 10, 11, 12, 13, 14, 15, 16 of the first, second, and third crossbeams of the test piece are structurally identical. Each motion mechanism includes a servo motor 21, a gear 22, a slider 23, a T-shaped plate 24, and a hand-cranked screw jack 25. The head of the T-shaped plate 24 is welded to one end of the crossbeam. The servo motor 21 is bolted to the lower end of the web of the T-shaped plate 24, and its shaft passes through... The T-shaped plate is fixedly connected to the gear 22; the gear 22 is fixedly connected to the servo motor shaft in the middle and meshes with the rack 17 at its outer end; the slider 23 is located directly below the hand-cranked screw jack 25 and meshes with the guide rail 19, and can slide along the guide rail direction; the hand-cranked screw jack 25 includes two lifting modules, which are fixed to the web of the T-shaped plate by bolts. Rotating the turntable can control the screw to move downward through the web of the T-shaped plate and press against the slider 23 to slightly raise the test piece beam, but the gear and rack do not separate, so that when the test piece beam is moved laterally, it does not rub against the test piece base 4, which is beneficial for lateral movement.

[0052] like Figure 1 As shown, the load loading system 3 is symmetrically distributed laterally and includes a lateral loading system 26 and a lateral loading system 27.

[0053] like Figure 5 , 6 As shown in Figures 7 and 8, the lateral 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 horizontal beam 32, a first fixed horizontal beam 33, a second horizontal beam 34, a second fixed horizontal beam 35, a first lateral guide rail 36, a second lateral guide rail 37, a third lateral guide rail 38, a fourth lateral guide rail 39, a fifth lateral guide rail 40, a sixth lateral guide rail 41, a seventh lateral guide rail 42, an eighth lateral guide rail 43, a first lateral slider 44, a second lateral slider 45, a third lateral slider 46, a fourth lateral 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. Horizontal first rack 52. Horizontal second rack 53. Horizontal first servo motor 54. Horizontal second servo motor 55. Horizontal third servo motor 56. Horizontal fourth servo motor 57. Horizontal first gear 58. Horizontal second gear 59. Horizontal third gear 60. Horizontal fourth gear 61. Horizontal first actuator cylinder 62. Horizontal second actuator cylinder 63. Horizontal third actuator cylinder 64. Horizontal fourth actuator cylinder 65. Horizontal first actuator cylinder clamp 66. Horizontal second actuator cylinder clamp 67. Horizontal third actuator cylinder clamp 68. Horizontal fourth actuator cylinder clamp 69. Horizontal first lead screw linkage lifting machine 70. Horizontal second lead screw linkage lifting machine 71.

[0054] 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 located at the four corners of the test bench base, respectively, and are fixed to the test bench base 1 by bolts. The base of the vertical beam is provided with tripods in the horizontal and lateral directions to ensure sufficient bending moment strength.

[0055] 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.

[0056] like Figure 6 , 7 As shown in Figures 8 and 9, the first horizontal slider 44, the second horizontal slider 45, the third horizontal slider 46, and the fourth horizontal slider 47 are respectively engaged on the first horizontal guide rail 36, the second horizontal guide rail 37, the third horizontal guide rail 38, and the fourth horizontal guide rail 39.

[0057] like Figure 6 , 7 As shown in Figures 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 to the first transverse slider 44, the second transverse slider 45, the third transverse slider 46, and the fourth slider 47 by bolts at their webs.

[0058] like Figure 6 , 7 As shown in Figures 8 and 9, one end of the first crossbeam 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; the two ends of the first fixed crossbeam 33 are fixed to the first vertical beam 28 and the second vertical beam 29 by bolts respectively, with both ends protruding slightly; one end of the second crossbeam 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; the two ends of the second fixed crossbeam 35 are fixed to the third vertical beam 30 and the fourth vertical beam 31 by bolts respectively, with both ends protruding slightly.

[0059] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse screw-driven lifting machine 70 is fixed to the lower surface of the first crossbeam 32, and the screws at both ends pass through the first crossbeam 32 and are fixed to the first fixed crossbeam 33; the second transverse screw-driven lifting machine 71 is fixed to the lower surface of the second crossbeam 34, and the screws at both ends pass through the second crossbeam 34 and are fixed to the second fixed crossbeam 35.

[0060] 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 to the inner side of the first crossbeam 32 and are symmetrically and parallelly distributed along the inner center line of the first crossbeam; the seventh transverse guide rail 42 and the eighth transverse guide rail 43 are fixed to the inner side of the second crossbeam 34 and are symmetrically and parallelly distributed along the inner center line of the second crossbeam.

[0061] like Figure 6 , 7 As shown in Figures 8 and 9, the first transverse rack 52 is fixed to 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 is parallel to them; the second transverse rack 53 is fixed to 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 is parallel to them.

[0062] like Figure 6 , 7As shown in Figures 8 and 9, the first transverse actuating cylinder clamp 66 and the second transverse actuating cylinder clamp 67 are both engaged on 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 actuating cylinder clamp 68 and the fourth transverse actuating cylinder clamp 69 are both engaged on 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.

[0063] like Figure 6 , 7 As shown in Figures 8 and 9, the first horizontal servo motor 54, the second horizontal servo motor 55, the third horizontal servo motor 56, and the fourth horizontal servo motor 57 are respectively fixed on the side plates of the first horizontal actuator clamp 66, the second horizontal actuator clamp 67, the third horizontal actuator clamp 68, and the fourth horizontal actuator clamp 69, with their rotating shafts passing through the side plates.

[0064] 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 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 mesh with the first transverse rack 52, and the third transverse gear 60 and the fourth transverse gear 61 mesh with the second transverse rack 53.

[0065] 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 to 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.

[0066] like Figure 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 second lateral rack 89. The following components are included: a second servo motor 91, a third servo motor 92, a fourth servo motor 93, a first servo motor 94, a second servo motor 95, a third servo motor 96, a fourth servo motor 97, a first servo motor 98, a second servo motor 99, a third servo motor 100, a fourth servo motor 101, a first servo motor clamp 102, a second servo motor clamp 103, a third servo motor clamp 104, a fourth servo motor clamp 105, a first lead screw linkage lift 106, and a second lead screw linkage lift 107.

[0067] like Figure 10 , 11 As shown in Figures 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.

[0068] like Figure 10 , 11 As shown in Figures 12 and 13, the lateral first slider 84, lateral second slider 85, lateral third slider 86, and lateral fourth slider 87 are respectively engaged with the lateral first guide rail 76, lateral second guide rail 77, lateral third guide rail 78, and lateral fourth guide rail 79.

[0069] like Figure 10 , 11 As shown in Figures 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; both ends of the first fixed side beam 73 are fixed to the top inner sides 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; both ends of the second fixed side beam 75 are fixed to the top inner sides of the second vertical beam 29 and the fourth vertical beam 31 by bolts.

[0070] like Figure 10 , 11As shown in Figures 12 and 13, the first lateral screw-driven lifting machine 106 is fixed to the lower surface of the first side beam 72, and the two screw rods pass through the first side beam 72 and are respectively fixed to one end of the first fixed crossbeam 33 and the second fixed crossbeam 35; the second lateral screw-driven lifting machine 107 is fixed to the lower surface of the second side beam 74, and the two screw rods pass through the second side beam 74 and are respectively fixed to the other end of the first fixed crossbeam 33 and the second fixed crossbeam 35.

[0071] like Figure 10 , 11 As shown in Figures 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.

[0072] like Figure 10 , 11 As shown in Figures 12 and 13, the first lateral rack 88 is fixed to the inner side of the first side beam 72, located slightly below the middle of the fifth lateral guide rail 80 and the sixth lateral guide rail 81, and parallel to them; the second lateral rack 89 is fixed to the inner side of the second side beam 74, located slightly below the middle of the seventh lateral guide rail 82 and the eighth lateral guide rail 83, and parallel to them.

[0073] like Figure 10 , 11 As shown in Figures 12 and 13, the first lateral actuating cylinder clamp 102 and the second lateral actuating cylinder clamp 103 are both engaged on the fifth lateral guide rail 80 and the sixth lateral guide rail 81, and can slide along the direction of 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 on the seventh lateral guide rail 82 and the eighth lateral guide rail 83, and can slide along the direction of the seventh lateral guide rail 82 and the eighth lateral guide rail 83, and are distributed left and right.

[0074] like Figure 10 , 11 As shown in Figures 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 plates of 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, with their rotating shafts passing through the side plates.

[0075] like Figure 10 , 11As shown in Figures 12 and 13, the lateral first gear 94, lateral second gear 95, lateral third gear 96, and lateral fourth gear 97 are respectively fixed on the rotating shafts of the lateral first servo motor 90, lateral second servo motor 91, lateral third servo motor 92, and lateral fourth servo motor 93. The lateral first gear 94 and lateral second gear 95 mesh with the lateral first rack 88, and the lateral third gear 96 and lateral fourth gear 97 mesh with the lateral second rack 89.

[0076] like Figure 10 , 11 As shown in Figures 12 and 13, the lateral first actuating cylinder 98, lateral second actuating cylinder 99, lateral third actuating cylinder 100, and lateral fourth actuating cylinder 101 are respectively fixed to the lateral first actuating cylinder clamp 102, the lateral second actuating cylinder clamp 103, the lateral third actuating cylinder clamp 104, and the lateral fourth actuating cylinder clamp 105 by bolts.

[0077] There are many specific ways to implement this invention. The above description is only a preferred embodiment of this invention. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of this invention, and these improvements should also be considered within the scope of protection of this invention.

Claims

1. A universal landing shelf structure load-bearing test device, characterized in that, The structural load-bearing test device includes a test base (1), a test piece platform (2), and a load loading system (3). The test platform (2) includes a test base (4), multiple test beams, and a test beam motion mechanism installed at both ends of the test beams, which supports the lander to be tested through the multiple test beams; The test specimen base (4) is fixed to the middle of the test base (1) by bolts. The test specimen base (4) is also fixedly installed with a first rack (17), a second rack (18), a first guide rail (19), and a second guide rail (20) of the test specimen platform that are parallel to each other. Multiple test beams are perpendicular to the first rack (17) of the test platform. The test 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) or the second guide rail (20) of the test platform. 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 meshes with the first rack (17) or the second rack (18) of the test platform. The test beam is driven to translate by the servo motor (21). The load loading system (3) includes multiple vertical beams surrounding the test 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 their bottom ends are fixedly connected to the test base (1). The lateral loading system (26) is provided in pairs symmetrically with the test platform (2) as the center. It includes a crossbeam arranged along the X direction and a lateral actuating cylinder installed on the crossbeam. The crossbeam is installed on the vertical beam in a liftable manner. The lateral actuating cylinder is arranged along the Y direction and is used to apply a Y-direction force to the lander to be tested. The lateral loading system (27) is provided in pairs symmetrically with respect to the test platform (2). It includes a side beam arranged along the Y direction and a lateral actuator cylinder installed on the side beam. The side beam is mounted on the vertical beam in a liftable manner. The lateral actuator cylinder is arranged along the X direction and is used to apply an X-direction force to the lander under test.

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

3. The universal landing shelf structure load-bearing test device according to claim 1, characterized in that, A fixed crossbeam is also fixedly installed at the top of the vertical beam. 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 lifting machine arranged along the Z direction. The housing of the transverse screw linkage lifting machine is fixedly installed on the crossbeam, and the top end of the screw of the transverse screw linkage lifting machine is fixedly connected to the fixed crossbeam. The crossbeam is driven to reciprocate up and down along the Z direction by the transverse screw linkage lifting machine. The lateral loading system (27) also includes a lateral screw linkage lifting machine arranged along the Z direction. The housing of the lateral screw linkage lifting machine is fixedly installed on the side beam, and the top of the screw of the lateral screw linkage lifting machine is fixedly connected to the fixed cross beam. The side beam is driven to reciprocate up and down along the Z direction by the lateral screw linkage lifting machine.

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

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

6. A universal landing shelf structure load-bearing test device according to any one of claims 1-5, characterized in that, The test piece platform (2) has four test piece beams; each beam 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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