A landing gear buffer dummy with adjustable length for a general aircraft static test machine

Abstract

The invention discloses a landing gear buffer dummy of a general aircraft static test machine with adjustable length, comprising a sleeve; length adjustment devices are arranged at both left and right ends of the sleeve; tensioning devices are arranged at both left and right parts of the outer side surface of the sleeve; the tensioning devices are engaged with the corresponding length adjustment devices. The length of the buffer dummy can be freely adjusted, and the buffer dummy itself has very high strength and is not easy to be damaged.

Description

Technical Field

[0001] The invention relates to a general aircraft landing gear design, in particular to a landing gear buffer dummy of a general aircraft static test machine with adjustable length. Background Art

[0002] The landing gear buffer dummy currently used is made of a non-adjustable length support rod or replaced by a real part. The non-adjustable length buffer dummy requires high processing accuracy and is only suitable for one aircraft model, so its universality is limited. In addition, the strength of the dummy itself is very high during the test, otherwise it will be particularly easy to damage the dummy. Summary of the invention

[0003] The invention aims to provide a landing gear buffer dummy of a general aircraft static test machine with adjustable length. The length of the buffer dummy can be freely adjusted, and the buffer dummy itself has very high strength and is not easy to be damaged.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a landing gear buffer dummy of a general aircraft static test machine with adjustable length includes a sleeve; length adjustment devices are provided at both ends of the sleeve; tensioning devices are provided on both the left and right parts of the outer side surface of the sleeve; the tensioning device is snap-fitted with the corresponding length adjustment device.

[0005] Preferably, the length adjustment device on the left side includes a threaded adjustment rod connected to the left side thread inside the sleeve; a clamping nut is threadedly sleeved on the right side of the outer side of the threaded adjustment rod; matching circular grooves are evenly opened on the left side of the clamping nut along the circumferential direction; the number of matching circular grooves is four; the length adjustment device on the right side has the same structure as the length adjustment device on the left side, and is symmetrical on the left and right.

[0006] Preferably, the tensioning device on the left side includes a rotating ring threadedly connected to the left portion of the outer surface of the sleeve; the left end face of the rotating ring is coaxially rotated with the tensioning ring; the left end face of the tensioning ring is evenly and fixedly connected with a tensioning rod along the circumferential direction; the tensioning rod is "L"-shaped; there are four tensioning rods; the right side surface of the inward protruding part of the tensioning rod is fixedly connected with a mating hemisphere; the mating hemisphere is snap-fitted with the mating circular groove; the tensioning device on the right side has the same structure as the tensioning device on the left side, and is symmetrical on the left and right.

[0007] Preferably, the left end surface of the threaded adjustment rod on the left side is fixedly connected to a first connecting member; and the right end surface of the threaded adjustment rod on the right side is fixedly connected to a second connecting member.

[0008] Preferably, the tensioning ring on the left and the tensioning ring on the right are fixedly connected via a reinforcing rod; the first end of the reinforcing rod 11 slides with the right side surface of the tensioning ring 6 on the left; and the second end of the reinforcing rod 11 slides with the left side surface of the tensioning ring 6.

[0009] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the use of this design reduces the difficulty of processing and assembly, and the operation is simple. The level of the fuselage can be adjusted by rotating the sleeve. The length of the buffer dummy can be locked by using the clamping nut, so that the data is stable when the aircraft is undergoing a static test. In addition, static testing machines using this type of buffer can use this type of buffer dummy for static testing, without the need for separate customization, and have strong versatility and practicality; and the structure of the present invention can strengthen the strength of the entire dummy, reduce the possibility of damage to the dummy during the test, and make the test process smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a structural diagram of the present invention;

[0011] Attached Figure 2 It is a schematic diagram of the length adjustment device of the present invention;

[0012] Attached Figure 3 It is a schematic diagram of the structure of the tensioning device of the present invention;

[0013] In the attached drawings: 1. sleeve; 2. threaded adjustment rod; 3. clamping nut; 4. matching circular groove; 5. rotating ring; 6. tightening ring; 7. tightening rod; 8. matching hemisphere; 9. first connecting piece; 10. second connecting piece; 11. reinforcing rod. DETAILED DESCRIPTION

[0014] A general aircraft static test machine landing gear buffer dummy with adjustable length, comprising a sleeve 1; length adjustment devices are arranged at both left and right ends of the sleeve 1; tensioning devices are arranged at both left and right parts of the outer side of the sleeve 1; the tensioning devices are engaged with the corresponding length adjustment devices. After the present invention is installed, the left and right length adjustment devices can be adjusted to a suitable length by twisting the sleeve 1 alone, which is very convenient.

[0015] The length adjustment device on the left side includes a threaded adjustment rod 2 which is threadedly connected to the left side of the sleeve 1; a clamping nut 3 is threadedly sleeved on the right side of the outer side of the threaded adjustment rod 2; the left side of the clamping nut 3 is evenly provided with matching circular grooves 4 along the circumferential direction; the matching circular grooves 4 are four in number; the length adjustment device on the right side has the same structure as the length adjustment device on the left side and is symmetrical on both sides. The upper and lower piston rod dummies of the buffer dummy are made of a threaded adjustment rod 2 with opposite thread directions. The two piston rod dummies are connected by a threaded sleeve 1, and two nuts with opposite threads on the outside of the sleeve 1 serve as clamping nuts 3. This design adjusts the length of the buffer dummy by rotating the sleeve 1, thereby adjusting the level of the static testing machine. The clamping nut 3 can lock the length of the buffer dummy.

[0016] The tensioning device on the left side includes a rotating ring 5 threadedly connected to the left part of the outer side of the sleeve 1; the left end face of the rotating ring 5 is coaxially rotated with a tensioning ring 6; the left end face of the tensioning ring 6 is evenly fixedly connected with a tensioning rod 7 along the circumferential direction; the tensioning rod 7 is "L" shaped; there are four tensioning rods 7; the right side of the inward protruding part of the tensioning rod 7 is fixedly connected with a matching hemisphere 8; the matching hemisphere 8 is snap-fitted with the matching circular groove 4; the tensioning device on the right side has the same structure as the tensioning device on the left side, and is symmetrical. The outer surface of the matching hemisphere 8 is particularly rough, which can increase the friction between the matching hemisphere 8 and the matching circular groove 4.

[0017] The left end face of the left threaded adjustment rod 2 is fixedly connected with a first connection member 9, and the right end face of the right threaded adjustment rod 2 is fixedly connected with a second connection member 10. The first connection member 9 is connected to the static testing machine, and the second connection member 10 is connected to the bracket carrying the static testing machine.

[0018] The tension ring 6 on the left is fixedly connected to the tension ring 6 on the right through a reinforcing rod 11; the first end of the reinforcing rod 11 is slidably matched with the right side of the tension ring 6 on the left; the second end of the reinforcing rod 11 is slidably matched with the left side of the tension ring 6; the two tension rings 6 can be rotated in opposite directions at the same time, and will also be subjected to the tension of the reinforcing rod 11. The reinforcing rod 11 can be a self-locking telescopic rod structure, which can be telescopic and self-locking. The strength between the two tension rings 6 is further strengthened by the reinforcing rod 11, that is, the strength between the two tensioning devices is strengthened.

[0019] When the present invention is used,

[0020] The first connecting member 9 is fixedly connected to the static testing machine, and the second connecting member 10 is fixedly connected to the bracket. The two rotating rings 5 ​​are screwed to loosen the tensioning device, that is, the matching hemisphere 8 on the tensioning ring 6 and the matching circular groove 4 on the clamping nut 3 are disengaged from the clamping fit, and the tensioning rod 7 no longer restricts the rotation of the clamping nut 3. Then, the two clamping nuts 3 are rotated so that the clamping nuts 3 no longer restrict the rotation between the two threaded adjustment rods 2 and the sleeve 1. Then, the sleeve 1 can be rotated to rotate the two threaded adjustment rods 2 at the same time, so that the two threaded adjustment rods 2 are extended or shortened, and the length of the entire buffer dummy is adjusted, that is, the upper and lower positions of the static testing machine are adjusted to the horizontal position with the bracket, and then the above process is repeated in reverse, the two threaded adjustment rods 2 are locked with the clamping nuts 3, and then the matching hemisphere 8 corresponds to the matching circular groove 4, and the tensioning ring 6 is rotated to tighten the tensioning rod 7, that is, the clamping nut 3 is restricted by the tensioning device, so that the entire present invention is not easy to be torn off or loosened when the static testing machine takes off and bumps.

[0021] The invention has been used on the LE600B static testing machine with good effects.

[0022] In the present invention, the inner and outer surfaces of the sleeve 1 are both threaded, and the outer surface of the threaded adjustment rod 2 is also threaded, so that the threaded adjustment rod 2 and the clamping nut 3 can be threadedly rotated, the threaded adjustment rod 2 and the inner surface of the sleeve 1 can be threadedly rotated, and the rotating ring 5 and the outer surface of the sleeve 1 can be threadedly rotated. In the description of this application, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

Claims

1. A landing gear buffer dummy for a general aircraft static test machine with adjustable length, characterized in that: It comprises a sleeve (1); the left and right ends of the sleeve (1) are both provided with length adjustment devices; the left and right parts of the outer side surface of the sleeve (1) are both provided with tensioning devices; the tensioning devices are engaged with the corresponding length adjustment devices; The length adjustment device on the left side comprises a threaded adjustment rod (2) threadably connected to the left side of the sleeve (1); a clamping nut (3) is threadably sleeved on the right side of the outer side of the threaded adjustment rod (2); matching circular grooves (4) are evenly formed on the left side of the clamping nut (3) along the circumferential direction; the matching circular grooves (4) are four in number; the length adjustment device on the right side has the same structure as the length adjustment device on the left side, and is symmetrical between the left and right sides; The tensioning device on the left side comprises a rotating ring (5) threadedly connected to the left part of the outer side surface of the sleeve (1); the left end surface of the rotating ring (5) is coaxially rotatably matched with a tensioning ring (6); the left end surface of the tensioning ring (6) is evenly and fixedly connected with tensioning rods (7) along the circumferential direction; the tensioning rods (7) are "L"-shaped; the number of the tensioning rods (7) is four; the right side surface of the inwardly protruding part of the tensioning rod (7) is fixedly connected with a matching hemisphere (8); the matching hemisphere (8) is snap-fitted with the matching circular groove (4); the tensioning device on the right side has the same structure as the tensioning device on the left side, and is symmetrical on both sides; The left end surface of the threaded adjustment rod (2) on the left side is fixedly connected to a first connection piece (9); the right end surface of the threaded adjustment rod (2) on the right side is fixedly connected to a second connection piece (10); the first connection piece (9) is fixedly connected to a static testing machine, and the second connection piece (10) is fixedly connected to a bracket that supports the static testing machine.

2. The adjustable length general aircraft static test machine landing gear buffer dummy according to claim 1, characterized in that: The tensioning ring (6) on the left side is connected to the tensioning ring (6) on the right side via a reinforcing rod (11).

Images