Airtight test clamp for undercarriage buffer

Abstract

The utility model provides an airtight test clamp for an undercarriage buffer. The air tightness test clamp for the undercarriage buffer comprises a support, baffles and connecting blocks, the baffles are installed on the support, the two baffles are arranged on the support at intervals, a plurality of first installation holes are circumferentially formed in the baffles, each first installation hole is provided with one connecting block, and the connecting blocks are connected with the baffles. One end of the connecting block is detachably fixed to the baffle, and a hook part used for fixing the buffer is formed at the other end of the connecting block. According to the utility model, a plurality of buffers can be clamped at one time, the plurality of buffers can be subjected to airtight test simultaneously, the bottleneck of a workshop test bed can be effectively relieved, and the airtight test efficiency of the undercarriage buffers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of landing gear air tightness testing, in particular to a landing gear buffer air tightness testing fixture. Background Art

[0002] The landing gear buffer is an important component of an aircraft's landing gear. Its main function is to absorb the impact load during landing and taxiing, protecting the aircraft and passengers. The piston rod needs to be tested for airtightness before leaving the factory. Specifically, the buffer's piston rod is extended to the designed length, then clamped to the fixture and placed into the airtight groove to be inflated. The piston rod is observed for bubbles to determine if the seal is acceptable. Existing fixtures have a simple structure and can only hold one buffer at a time. This results in low test efficiency and a small number of tests, which can easily lead to a situation where buffers are waiting in a concentrated queue, making it difficult to ensure on-time delivery of products. Utility Model Content

[0003] The purpose of the utility model is to provide an airtight test fixture for a landing gear buffer, so as to improve the test efficiency and ensure the on-time delivery rate of products.

[0004] The technical solution of the present utility model is: a landing gear buffer airtightness test fixture, comprising a bracket, a baffle and a connecting block, the baffle being mounted on the bracket, and two baffles being arranged on the bracket at intervals, a plurality of first mounting holes being circumferentially provided on the baffle, each of the first mounting holes being mounted with a connecting block, one end of the connecting block being detachably fixed to the baffle, and the other end of the connecting block forming a hook for fixing the buffer.

[0005] Preferably, the bracket includes a base plate and a support plate vertically connected to the base plate, the support plates are located at both ends of the base plate, and the baffle is installed on the support plates.

[0006] Preferably, the bracket includes a bottom plate and a support plate, two bottom plates are arranged at intervals, each bottom plate is vertically connected to a support plate, and the baffle is installed on the support plate.

[0007] Preferably, the landing gear buffer airtightness test fixture further includes a pull rod, and the pull rod is installed in at least one group of the plurality of first mounting holes.

[0008] Preferably, the landing gear buffer airtightness test fixture also includes a connecting shaft, a U-shaped groove is provided on the top of the bracket, and a second mounting hole is also provided on the baffle, one end of the connecting shaft is installed in the U-shaped groove, and the other end of the connecting shaft is installed in the second mounting hole through a bearing.

[0009] Preferably, the connecting shaft includes a first shaft, a second shaft, a flange and a third shaft arranged in sequence, a plurality of third mounting holes are circumferentially provided on the flange, a plurality of threaded holes corresponding to the positions of the third mounting holes are also provided on the baffle, the third shaft is installed in the second mounting hole, the flange is in surface contact with the baffle and fasteners are installed in the third mounting holes and threaded holes that are aligned one by one, and the first shaft is arranged in a U-shaped groove.

[0010] Preferably, the connecting block further comprises a screw connected to the hook portion, the screw being installed in the first mounting hole, and a through slot penetrating vertically is provided in the middle of the hook portion.

[0011] Preferably, the end of the hook portion is provided with a hook groove for installing a pin, and the hook groove passes through upward.

[0012] Compared with the related art, the beneficial effects of the present invention are:

[0013] 1. The landing gear buffer air tightness test fixture can clamp multiple buffers at a time, enabling simultaneous air tightness testing of multiple buffers, effectively alleviating the bottleneck of the workshop test bench and improving the efficiency of landing gear buffer air tightness testing;

[0014] 2. Design the structure of the connecting block to better match the lug and piston rod structure of the buffer to achieve stable clamping;

[0015] 3. The parts of this utility model have a simple structure and are easy to process, assemble and maintain;

[0016] Fourth, the baffle is rotatably installed on the bracket through the connecting shaft, which can rotate the installation position of the buffer so that it is always at the top, making it easier to install the buffer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view structural diagram of the landing gear buffer airtightness test fixture provided by the utility model;

[0018] Figure 2 for Figure 1 Side view of;

[0019] Figure 3 is a schematic diagram of the structure of the bracket;

[0020] Figure 4 for Figure 3 A top view of

[0021] Figure 5 Schematic diagram of the structure of the baffle;

[0022] Figure 6 It is a structural diagram of the connecting shaft;

[0023] Figure 7 for Figure 6 Side view of;

[0024] Figure 8 It is a structural diagram of the connection block;

[0025] Figure 9 for Figure 8 A top view of

[0026] Figure 10 It is a structural diagram of the pull rod;

[0027] Figure 11 Schematic diagram of the pin structure.

[0028] In the accompanying drawings: 1. bracket; 11. support plate; 12. bottom plate; 13. U-shaped groove; 2. baffle; 21. first mounting hole; 22. second mounting hole; 23. threaded hole; 3. connecting shaft; 31. first shaft; 32. second shaft; 33. flange; 34. third shaft; 35. third mounting hole; 4. bearing; 5. nut; 6. connecting block; 61. hook; 62. screw; 63. through groove; 64. hook groove; 7. pin; 8. pull rod; 9. fastener; 10. buffer; 101. ear; 102. piston rod. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined unless they conflict. For ease of description, the words "upper," "lower," "left," and "right" appear below merely to indicate the directions of upper, lower, left, and right in the accompanying drawings and do not limit the structure.

[0030] like Figure 1 、 Figure 2 As shown, the landing gear buffer airtightness test fixture provided in this embodiment includes a bracket 1, a baffle 3, a connecting shaft 3, a bearing 4, a nut 5, a connecting block 6, a pin 7, a pull rod 8 and a fastener 9.

[0031] like Figure 1 、 Figure 3 、 Figure 4 As shown, the bracket 1 includes a support plate 11 and a base plate 12. In this embodiment, two base plates 12 are provided at intervals, so that the bracket 1 is a split structure, and each base plate 12 is vertically connected to a support plate 11. In a second embodiment, the base plate 12 can be a monolithic structure, with the support plates 11 vertically connected at both ends of its length.

[0032] like Figure 4 As shown, the bottom plate 12 is welded into an I-shape by square tubes, and the support plate 11 is welded into an N-shape by square tubes. A U-shaped groove 13 is opened at the upper end of the N-shaped support plate 11.

[0033] like Figure 1 、 Figure 5 The baffle 2 is a circular plate-like structure, provided with a first mounting hole 21, a second mounting hole 22, and a threaded hole 23. There are six first mounting holes 21, arranged circumferentially. There is one second mounting hole 22, located in the center of the baffle 2. There are multiple threaded holes 23, arranged circumferentially. Multiple first mounting holes 21 are located around the threaded hole 23, and multiple threaded holes 23 are located around the second mounting hole 22.

[0034] like Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 As shown, the connecting shaft 3 includes a first shaft 31, a second shaft 32, a flange 33, and a third shaft 34, arranged in sequence. The flange 33 is circumferentially provided with multiple third mounting holes 35. The flange 33 is circumferentially provided with multiple third mounting holes 35. The third shaft 34 is mounted in the second mounting hole 22 via a bearing 4. The flange 33 is face-to-face with the baffle 2, and fasteners 9 (such as bolts, nuts, and washers) are installed in the aligned third mounting holes 35 and threaded holes 23. The first shaft 31 is fixed in the U-shaped groove 13, which must meet machining and installation precision requirements. The bearing 4 allows the baffle 2 to rotate relative to the connecting shaft 3.

[0035] like Figure 8 、 Figure 9 As shown, the connecting block 6 comprises a screw rod 62 and a hook portion 61 connected to each other, wherein the hook portion 61 has a hook groove 64 formed at one end away from the screw rod 62 and the hook groove 64 is passed through upward. A through groove 63 is formed in the middle of the hook portion 61 and passes through from top to bottom.

[0036] like Figure 1 As shown, the screw rod 62 passes through the first mounting hole 21 and is fixed by the nut 5. The ear piece 101 of the buffer 10 is placed in the through groove 63 of the connecting block 6 installed on the baffle 2 on one side, the pin 7 is inserted into the hole on the ear piece 101, and the hook portion 61 hooks the two ends of the pin 7 so that the pin 7 is placed in the hook groove 64. The piston rod 102 of the buffer 10 is placed in the through groove 63 of the connecting block 6 installed on the baffle 2 on the other side, the pin 7 is inserted into the hole on the piston rod 102, and the hook portion 61 hooks the two ends of the pin 7 so that the pin 7 is placed in the hook groove 64. In this way, one buffer 10 is installed and fixed by the connecting block 6 on the same axis on the two baffles 2. The other four buffers 10 are then installed in this way. During the installation process, the baffle 2 can be rotated to adjust the installation position. As shown Figure 11 As shown, the pin 7 is a standard part, and its length needs to be longer than the sum of the widths of the connecting block 6 and the ear piece 101.

[0037] like Figure 10 As shown, the two ends of the pull rod 8 are provided with threaded rods, which are respectively inserted into the corresponding second mounting holes 21 on the two baffles 2 and then fixed by nuts 5 (as shown in FIG. Figure 1 As shown in the figure). Figure 1 、 Figure 2 、 Figure 5 As shown, among the six first mounting holes 21 arranged in a circle, four are used to mount the buffers 10 , and the remaining two are used to mount the pull rods 8 .

[0038] The split bracket 1 can adjust the spacing by setting the corresponding stroke according to the airtightness test requirements of the buffer 10 , and the length of the threaded rod on the pull rod 8 is adapted to the adjustment of the stroke length of all buffers 10 .

[0039] The entire structure fully meets the acceptance specifications and the design airtightness requirements, and the device is simple in structure and easy to operate, ensuring the airtightness test of the aircraft buffer and meeting the design and use requirements under harsh environmental conditions.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A landing gear buffer airtightness test fixture, characterized in that: The invention comprises a bracket (1), a baffle (2) and a connecting block (6), wherein the baffle (2) is mounted on the bracket (1), and two baffles (2) are arranged on the bracket (1) at intervals, and a plurality of first mounting holes (21) are provided on the baffle (2) in a circumferential manner, and each of the first mounting holes (21) is mounted with a connecting block (6), one end of the connecting block (6) is detachably fixed to the baffle (2), and the other end of the connecting block (6) forms a hook portion (61) for fixing the buffer.

2. The landing gear buffer airtightness test fixture according to claim 1, characterized in that: The bracket (1) comprises a base plate (12) and a support plate (11) vertically connected to the base plate (12), the support plate (11) being located at both ends of the base plate (12), and the baffle (2) being mounted on the support plate (11).

3. The landing gear buffer airtightness test fixture according to claim 1, characterized in that: The bracket (1) comprises a bottom plate (12) and a support plate (11), two bottom plates (12) are arranged at intervals, each bottom plate (12) is vertically connected to a support plate (11), and the baffle (2) is mounted on the support plate (11).

4. The landing gear buffer airtightness test fixture according to claim 3, characterized in that: It also includes a pull rod (8), and the pull rod (8) is installed in at least one group of the first mounting holes (21) among the plurality of the first mounting holes (21).

5. The landing gear buffer airtightness test fixture according to any one of claims 1 to 3, characterized in that: It also includes a connecting shaft (3), a U-shaped groove (13) is provided on the top of the bracket (1), and a second mounting hole (22) is provided on the baffle (2), one end of the connecting shaft (3) is installed in the U-shaped groove (13), and the other end of the connecting shaft (3) is installed in the second mounting hole (22) through a bearing (4).

6. The landing gear buffer airtightness test fixture according to claim 5, characterized in that: The connecting shaft (3) comprises a first shaft (31), a second shaft (32), a flange (33) and a third shaft (34) which are arranged in sequence. The flange (33) is provided with a plurality of third mounting holes (35) in a circumferential manner. The baffle (2) is also provided with a plurality of threaded holes (23) corresponding to the positions of the third mounting holes (35). The third shaft (34) is installed in the second mounting hole (22). The flange (33) and the baffle (2) are in contact with each other and fasteners (9) are installed in the third mounting holes (35) and the threaded holes (23) which are aligned one by one. The first shaft (31) is arranged in the U-shaped groove (13).

7. The landing gear buffer airtightness test fixture according to any one of claims 1 to 3, characterized in that: The connecting block (6) further comprises a screw rod (62) connected to the hook portion (61), the screw rod (62) being mounted in the first mounting hole (21), and a through slot (63) penetrating vertically is provided in the middle of the hook portion (61).

8. The landing gear buffer airtightness test fixture according to any one of claims 1 to 3, characterized in that: The end of the hook portion (61) is provided with a hook groove (64) for mounting the pin (7), and the hook groove (64) is passed through upward.

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