A landing gear vertical position leakage test bench

Abstract

This invention belongs to the field of landing gear testing technology, specifically relating to a landing gear vertical position leakage test bench, including a base plate, support frames connected to the four corners of the base plate, a top plate fixedly connected to the top of the support frames, three sets of mounting frames fixedly connected to the top of the base plate, a connecting block fixedly connected to the bottom of the top plate, a landing gear disposed between the base plate and the top plate, and three fixing posts fixedly connected between the base plate and the top plate. This invention proposes that by moving the lever to disengage the limiting block and its locking pin from the groove at the top of the mounting block, and then slightly lifting the test bench and pulling the heavy-duty adjusting feet outward, the heavy-duty adjusting feet can be removed from the bottom of the support frame from the side, thus making the disassembly and replacement of the heavy-duty adjusting feet more convenient.

Description

Technical Field

[0001] This invention belongs to the field of landing gear testing technology, specifically relating to a landing gear vertical position leakage test bench. Background Technology

[0002] Vertical position leakage test: The aircraft landing gear piston is placed vertically for 24 hours with the normal shutdown compression position. No hydraulic oil leakage or air pressure loss is allowed during the test, so the landing gear needs to be tested on a test bench.

[0003] In order to facilitate the balance of the test bench during the test, heavy-duty adjusting feet are usually installed at the four corners of the test bench. However, after a long period of use, the anti-slip pads at the bottom of the adjusting feet are easily damaged due to the friction between the adjusting feet and the ground. Although the adjusting feet can be unscrewed from the bottom of the test bench by rotating them, the test bench needs to be flipped or the corners lifted during the disassembly process. However, considering the weight of the test bench, flipping or lifting the corners is very inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a landing gear vertical position leakage test bench, which aims to solve the problem of existing test benches in the prior art. In order to facilitate the balance of the test bench during the test, heavy-duty adjusting feet are usually installed at the four corners of the test bench. However, after a long period of use, the anti-slip pads at the bottom of the adjusting feet are easily damaged due to the friction between the adjusting feet and the ground. Although the adjusting feet can be unscrewed from the bottom of the test bench by rotating them, the test bench needs to be flipped or the corners lifted during the disassembly process. However, considering the weight of the test bench, flipping or lifting the corners is very inconvenient.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a landing gear vertical position leakage test bench, comprising a base plate, support frames connected to the four corners of the base plate, a top plate fixedly connected to the top of the support frames, three sets of mounting frames fixedly connected to the top of the base plate, a connecting block fixedly connected to the bottom of the top plate, a landing gear provided between the base plate and the top plate, and three fixed columns fixedly connected between the base plate and the top plate; One end of the support frame is provided with an installation groove, and one end of the support frame is provided with a heavy-duty adjusting foot cup. One end of the heavy-duty adjusting foot cup is fixedly connected to an installation block. The inner cavity of the support frame is provided with a spring. One end of the spring is connected to a limit block. One end of the limit block is connected to a locking pin. The outer wall of the limit block is fixedly connected to a lever.

[0006] In order to enable the installation of heavy-duty adjustable feet from the side of the support frame, as a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the size of the mounting block matches that of the mounting groove.

[0007] In order to enable the locking pin to penetrate through the top of the mounting block, as a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the top of the mounting block is provided with a groove that matches the size of the locking pin.

[0008] In order to achieve the installation and fixation of the heavy-duty adjusting feet, as a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the support frame forms an elastic engagement structure with the heavy-duty adjusting feet through the mounting groove, mounting block, spring, limit block, locking pin, and lever block.

[0009] As a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, a hydraulic cylinder is installed on the inner side of the mounting frame, a mounting plate is provided on one side of the hydraulic cylinder, a vertical scale is installed on the surface of the mounting plate, two linear bearings are provided on the top of the mounting frame, a linear optical axis is inserted through one end of the linear bearing, a lifting top plate is connected to one end of the linear optical axis, and a top head is connected to the top of the lifting top plate.

[0010] As a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the bottom of the connecting block is provided with a mounting bracket, the top of the mounting bracket is inserted through a connecting pin, and the bottom of the mounting bracket is provided with a mounting pin.

[0011] As a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the outer walls of the three fixed columns are provided with multiple threaded holes, the outer walls of the three fixed columns are fitted with connecting sleeves, the outer walls of the connecting sleeves are threaded through with limit bolts, the outer walls of the connecting sleeves are fixedly connected with telescopic rods, one end of the telescopic rod is connected to a mounting base, one end of the mounting base is inserted with a bidirectional threaded rod, the outer walls of the bidirectional threaded rod are threaded with two moving blocks, one end of the moving blocks is fixedly connected to a clamping block.

[0012] In order to achieve the adjustment of different heights of the mounting base, as a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the multiple threaded holes are distributed at equal intervals.

[0013] In order to fix the position of the connecting sleeve, as a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, the connecting sleeve is connected to the fixing column by a threaded hole and a limiting bolt.

[0014] In order to enable the movement of the two moving blocks, as a preferred embodiment of the landing gear vertical position leakage test bench of the present invention, one end of the bidirectional threaded rod is connected to the mounting base through a bearing to form a rotating connection structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By moving the lever to disengage the limit block and the locking pin from the groove at the top of the mounting block, the heavy-duty adjusting cup can be removed from the bottom of the support frame by slightly lifting the test platform and pulling it outward. This makes it easier to disassemble and replace the heavy-duty adjusting cup.

[0016] 2. Fix one end of the landing gear to the mounting bracket using mounting pins, then connect the other end of the landing gear to the top head. Finally, activate the hydraulic cylinder to raise the top plate and move the top head upward to compress the landing gear, thereby checking for hydraulic oil leakage in the vertical position of the landing gear.

[0017] 3. The mounting base is extended outward by the telescopic rod, so that the landing gear can be between the two clamping blocks on one side of the mounting base. Then, by rotating the adjusting plate, the bidirectional threaded rod is rotated, so that the two moving blocks drive the clamping blocks to move towards each other, thereby clamping one end of the landing gear and improving the stability of the test.

[0018] 4. By loosening the limit bolt, the connecting sleeve can slide along the outer wall of the fixed column. Finally, after reaching the appropriate position, the connecting sleeve is fixed by threading the limit bolt into the corresponding threaded hole, thereby allowing the position of the clamping block to be adjusted. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the present invention; Figure 4 This is an enlarged structural schematic diagram of the present invention (A). Figure 5 This is a schematic diagram of the enlarged structure B of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the heavy-duty adjustable foot cup of the present invention. Figure 7 This is a schematic diagram of the three-dimensional structure of the support frame of the present invention; Figure 8 This is a schematic diagram of the enlarged structure of the present invention.

[0020] In the diagram: 1. Base plate; 2. Support frame; 21. Mounting slot; 22. Heavy-duty adjusting feet; 23. Mounting block; 24. Spring; 25. Limiting block; 26. Locking pin; 27. Pulling block; 3. Top plate; 4. Mounting frame; 41. Hydraulic cylinder; 42. Mounting plate; 43. Vertical scale; 44. Linear bearing; 45. Linear optical axis; 46. Lifting top plate; 47. Top head; 5. Connecting block; 51. Mounting bracket; 52. Connecting pin; 53. Mounting pin; 6. Landing gear; 7. Fixed column; 71. Threaded hole; 72. Connecting sleeve; 73. Limiting bolt; 74. Telescopic rod; 75. Mounting seat; 76. Two-way threaded rod; 77. Moving block; 78. Clamping block. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-5 The present invention provides the following technical solution: a landing gear vertical position leakage test bench, including a base plate 1, support frames 2 connected to the four corners of the base plate 1, a top plate 3 fixedly connected to the top of the support frames 2, three sets of mounting frames 4 fixedly connected to the top of the base plate 1, a connecting block 5 fixedly connected to the bottom of the top plate 3, a landing gear 6 provided between the base plate 1 and the top plate 3, and three fixed columns 7 fixedly connected between the base plate 1 and the top plate 3; One end of the support frame 2 is provided with an installation groove 21, and one end of the support frame 2 is provided with a heavy-duty adjusting foot cup 22. One end of the heavy-duty adjusting foot cup 22 is fixedly connected to an installation block 23. The inner cavity of the support frame 2 is provided with a spring 24. One end of the spring 24 is connected to a limit block 25. One end of the limit block 25 is connected to a locking pin 26. The outer wall of the limit block 25 is fixedly connected to a lever block 27.

[0023] Preferably, the mounting block 23 is sized to match the mounting groove 21, and the top of the mounting block 23 is provided with a groove that matches the size of the locking pin 26. The support frame 2 forms an elastic locking structure with the heavy-duty adjusting cup 22 through the mounting groove 21, the mounting block 23, the spring 24, the limiting block 25, the locking pin 26, the toggle block 27, and the heavy-duty adjusting cup 22.

[0024] In practical use, by moving the lever 27 to make the limit block 25 drive the locking pin 26 to disengage from the groove at the top of the mounting block 23, and then by slightly lifting the test platform and pulling the heavy-duty adjusting cup 22 outward, the heavy-duty adjusting cup 22 can be removed from the bottom of the support frame 2 from the side, thus making it easier to disassemble and replace the heavy-duty adjusting cup 22. Conversely, when installing the heavy-duty adjusting foot cup 22, first move the lever 27 to cause the limiting block 25 to drive the locking pin 26 to retract into the support frame 2, then push the mounting block 23 from the side of the support frame 2 into the mounting groove 21, and finally release the lever 27 to allow the locking pin 26 to be inserted into the groove at the top of the mounting block 23 under the action of the spring 24 and the limiting block 25 to achieve fixation. It should be noted that the dimensions of the connection between the mounting block 23 and the heavy-duty adjusting foot cup 22 are different, so the mounting groove 21 at one end of the support frame 2 is T-shaped, which makes it impossible to pull out from the bottom after the mounting block 23 is inserted.

[0025] Preferably: a hydraulic cylinder 41 is installed on the inner side of the mounting frame 4, a mounting plate 42 is provided on one side of the hydraulic cylinder 41, a vertical scale 43 is installed on the surface of the mounting plate 42, two linear bearings 44 are provided on the top of the mounting frame 4, a linear optical axis 45 is inserted through one end of the linear bearing 44, a lifting top plate 46 is connected to one end of the linear optical axis 45, a top head 47 is connected to the top of the lifting top plate 46, a mounting bracket 51 is provided at the bottom of the connecting block 5, a connecting pin 52 is inserted through the top of the mounting bracket 51, and a mounting pin 53 is provided at the bottom of the mounting bracket 51; It should be noted that the linear bearing 44 and the linear optical axis 45 play a guiding role in the lifting and lowering process of the lifting top plate 46. One end of the lifting top plate 46 is connected to the vertical scale 43 through the follower arm, so that the vertical scale 43 moves together when the lifting top plate 46 is lifted and lowered. The mounting bracket 51 is connected to the top plate 3 through the connecting pin 52 and the connecting block 5, and the mounting bracket 51 is located directly above the mounting frame 4.

[0026] In practical use, one end of the landing gear 6 is fixed to the mounting bracket 51 by the mounting pin 53, and the other end of the landing gear 6 is connected to the top head 47. Finally, the hydraulic cylinder 41 is activated to make the lifting top plate 46 move the top head 47 upward to compress the landing gear 6, thereby realizing whether the hydraulic oil in the vertical position of the landing gear 6 is leaking.

[0027] Preferably, the outer walls of the three fixed posts 7 are provided with multiple threaded holes 71, and the outer walls of the three fixed posts 7 are fitted with connecting sleeves 72. The outer walls of the connecting sleeves 72 are threaded through with limit bolts 73. The outer walls of the connecting sleeves 72 are fixedly connected with telescopic rods 74. One end of the telescopic rods 74 is connected to a mounting base 75. One end of the mounting base 75 is inserted with a bidirectional threaded rod 76. The outer walls of the bidirectional threaded rod 76 are threadedly connected with two moving blocks 77. One end of the moving blocks 77 is fixedly connected with a clamping block 78. The multiple threaded holes 71 are evenly distributed. The connecting sleeves 72 are threadedly fixedly connected to the fixed posts 7 through the threaded holes 71 and the limit bolts 73. One end of the bidirectional threaded rod 76 is rotatably connected to the mounting base 75 through a bearing.

[0028] In practical use, the mounting base 75 is extended outward by the telescopic rod 74, so that the landing gear 6 can be between the two clamping blocks 78 on one side of the mounting base 75. Then, by rotating the adjustment plate, the bidirectional threaded rod 76 is rotated, so that the two moving blocks 77 drive the clamping blocks 78 to move towards each other, thereby clamping one end of the landing gear 6 and improving the stability of the test. Furthermore, by loosening the limiting bolt 73, the connecting sleeve 72 can slide along the outer wall of the fixed column 7. Finally, after reaching the appropriate position, the connecting sleeve 72 is fixed by threading the limiting bolt 73 into the corresponding threaded hole 71, thereby enabling the adjustment of the clamping position of the clamping block 78.

[0029] Working principle: When using this landing gear vertical position leakage test bench, firstly, one end of the landing gear 6 is fixed to the mounting bracket 51 by the mounting pin 53, and then the other end of the landing gear 6 is connected to the top head 47. Finally, by activating the hydraulic cylinder 41, the lifting top plate 46 drives the top head 47 to move upward to compress the landing gear 6, thereby verifying whether there is hydraulic oil leakage in the vertical position of the landing gear 6. During this process, the mounting base 75 is extended outward by the telescopic rod 74, so that the landing gear 6 can be positioned between two clamping blocks 78 on one side of the mounting base 75. Then, by rotating the adjusting plate, the bidirectional threaded rod 76 is rotated, causing the two moving blocks 77 to move the clamping blocks 78 towards each other, thereby verifying whether there is hydraulic oil leakage in the vertical position of the landing gear. One end of 6 acts as a clamp, improving the stability of the test. By loosening the limiting bolt 73, the connecting sleeve 72 can slide along the outer wall of the fixed column 7. Finally, after reaching the appropriate position, the connecting sleeve 72 is fixed by threading the limiting bolt 73 into the corresponding threaded hole 71. This allows the position of the clamping block 78 to be adjusted. Finally, when it is necessary to disassemble and replace the heavy-duty adjusting cup 22, the limiting block 25 is disengaged from the groove at the top of the mounting block 23 by moving the lever 27. Then, the test platform is slightly lifted, and the heavy-duty adjusting cup 22 is pulled outward to remove it from the bottom of the support frame 2 from the side.

[0030] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A landing gear vertical position leakage test bench, comprising a base plate (1), characterized in that: Support frames (2) are connected to the four corners of the base plate (1). A top plate (3) is fixedly connected to the top of the support frame (2). Three sets of mounting frames (4) are fixedly connected to the top of the base plate (1). A connecting block (5) is fixedly connected to the bottom of the top plate (3). A landing gear (6) is provided between the base plate (1) and the top plate (3). Three fixed columns (7) are fixedly connected between the base plate (1) and the top plate (3). One end of the support frame (2) is provided with an installation groove (21), and one end of the support frame (2) is provided with a heavy-duty adjusting foot cup (22). One end of the heavy-duty adjusting foot cup (22) is fixedly connected to an installation block (23). The inner cavity of the support frame (2) is provided with a spring (24). One end of the spring (24) is connected to a limit block (25). One end of the limit block (25) is connected to a locking pin (26). The outer wall of the limit block (25) is fixedly connected to a lever (27). The size of the installation block (23) matches that of the installation groove (21). The top of the installation block (23) The support frame (2) has a groove that matches the size of the locking pin (26). The support frame (2) forms an elastic engagement structure with the heavy-duty adjusting cup (22) through the mounting groove (21), mounting block (23), spring (24), limiting block (25), locking pin (26), and push block (27). By pushing the push block (27) to make the limiting block (25) drive the locking pin (26) to disengage from the groove at the top of the mounting block (23), and then by slightly lifting the test platform and pulling the heavy-duty adjusting cup (22) outward, the heavy-duty adjusting cup (22) can be removed from the bottom of the support frame (2) from the side.

2. The landing gear vertical position leakage test bench according to claim 1, characterized in that: A hydraulic cylinder (41) is installed on the inner side of the mounting frame (4). A mounting plate (42) is provided on one side of the hydraulic cylinder (41). A vertical ruler (43) is installed on the surface of the mounting plate (42). Two linear bearings (44) are provided on the top of the mounting frame (4). A linear optical axis (45) is inserted through one end of the linear bearing (44). A lifting top plate (46) is connected to one end of the linear optical axis (45). A top head (47) is connected to the top of the lifting top plate (46).

3. The landing gear vertical position leakage test bench according to claim 1, characterized in that: The bottom of the connecting block (5) is provided with a mounting bracket (51), the top of the mounting bracket (51) is inserted through a connecting pin (52), and the bottom of the mounting bracket (51) is provided with a mounting pin (53).

4. The landing gear vertical position leakage test bench according to claim 1, characterized in that: The outer walls of the three fixed columns (7) are provided with multiple threaded holes (71). The outer walls of the three fixed columns (7) are fitted with connecting sleeves (72). The outer wall of the connecting sleeves (72) is threaded through with limit bolts (73). The outer wall of the connecting sleeves (72) is fixedly connected with a telescopic rod (74). One end of the telescopic rod (74) is connected to a mounting base (75). One end of the mounting base (75) is inserted with a bidirectional threaded rod (76). The outer wall of the bidirectional threaded rod (76) is threaded with two moving blocks (77). One end of the moving block (77) is fixedly connected with a clamping block (78).

5. A landing gear vertical position leakage test bench according to claim 4, characterized in that: The multiple threaded holes (71) are distributed at equal intervals.

6. The landing gear vertical position leakage test bench according to claim 4, characterized in that: The connecting sleeve (72) is connected to the fixing column (7) by a threaded hole (71) and a limiting bolt (73).

7. A landing gear vertical position leakage test bench according to claim 4, characterized in that: One end of the bidirectional threaded rod (76) is connected to the mounting base (75) via a bearing to form a rotating connection structure.

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