A high damping cylinder seat connection structure

Abstract

The present invention discloses a high damping cylinder seat connection structure, including a rubber damper, a damper mounting seat and a screw; the damper mounting seat is L-shaped, and one side is provided with a through hole symmetrical along the center line, and the screw passes through the through hole to fix the damper mounting seat on the connecting rod cylinder seat of the aircraft; the other side of the damper mounting seat is parallel to the connecting rod hole wall of the connecting rod cylinder seat, and a through hole is arranged in the center of this side, and one end of the rubber damper column passes through the through hole to install and position the rubber damper in the gap between the damper mounting seat and the connecting rod hole wall of the connecting rod cylinder seat; the height of one end of the rubber damper column extending out of the damper mounting seat is about 3-4 mm, and the rubber damper is in direct contact with the landing gear torque arm and has an interference fit. The present invention dissipates a part of the energy transmitted to the landing gear torque arm by providing a motion resistance, so that the braking torque is slowly and steadily transmitted to the landing gear torque arm, thereby eliminating and slowing down the shaking phenomenon of the landing gear.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation landing gear systems, and in particular relates to a cylinder seat connection structure. Background Art

[0002] The aircraft landing gear system is a complex, multi-degree-of-freedom dynamic system that will produce a vibration response during the braking process of the brake wheel. With the improvement of aircraft design requirements, the vibration problem generated by the normal operation of the brake system has received more and more attention. During the operation of the brake wheel, the occurrence of vibration will cause discomfort to the people on the aircraft. If the vibration phenomenon is severe, causing the amplitude to rise sharply, harmful vibration will be generated, which may cause damage to the brake wheel and landing gear at the least, or even cause the aircraft to be destroyed and people to die. Since the advent of aircraft, vibration problems have always existed during aircraft braking. There are generally three ways to avoid vibration, namely, weakening or eliminating the excitation source, increasing system damping to reduce the transmission of vibration, and enhancing the vibration resistance of the structure.

[0003] The landing gear torque arm is generally made of alloy structural steel, and the connecting rod cylinder seat is generally made of aluminum alloy. The common connecting parts between the cylinder seat and the landing gear torque arm are mainly lugs or connecting rod bushings. The lugs are generally made of cast bronze, and the connecting rod bushings are generally made of cast bronze or alloy steel. The cooperation between the landing gear torque arm and the cylinder seat is in a high-load non-static working environment, and the connecting rod cylinder seat needs to transmit a braking torque of tens of thousands of Newton meters to the landing gear torque arm. In this process, the lugs and connecting rod bushings can play a role in wear resistance and protecting the cylinder seat. Figure 2 As shown, the connection structure between the cylinder seat and the landing gear in the prior art is still a metal-to-metal connection structure, and the connection between the cylinder seat and the landing gear torque arm is a rigid connection. In addition, no damper is designed separately in these structures, and the damping at the connection is very small, which is easy to generate vibration. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a high damping cylinder seat connection structure, including a rubber damper, a damper mounting seat and a screw; the damper mounting seat is L-shaped, one side is provided with a through hole symmetrical along the center line, and the screw passes through the through hole to fix the damper mounting seat on the connecting rod cylinder seat of the aircraft; the other side of the damper mounting seat is parallel to the connecting rod hole wall of the connecting rod cylinder seat, and a through hole is arranged in the center of this side, and one end of the rubber damper column passes through the through hole to install and position the rubber damper in the gap between the damper mounting seat and the connecting rod hole wall of the connecting rod cylinder seat; the height of one end of the rubber damper column extending out of the damper mounting seat is about 3-4 mm, and the rubber damper is in direct contact with the landing gear torque arm and has an interference fit. The present invention dissipates a part of the energy transmitted to the landing gear torque arm by providing a motion resistance, so that the braking torque is slowly and steadily transmitted to the landing gear torque arm, thereby eliminating and slowing down the shaking phenomenon of the landing gear.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A high damping cylinder seat connection structure comprises a rubber damper, a damper mounting seat and screws;

[0007] The rubber damper is a T-shaped structure, consisting of a flat plate and a column;

[0008] The damper mounting seat is L-shaped, and one side of the L-shape is provided with N through holes symmetrically along the center line, and the screws pass through the through holes to fix the damper mounting seat on the connecting rod cylinder seat of the aircraft;

[0009] The other L-shaped surface of the damper mounting seat is parallel to the connecting rod hole wall of the connecting rod type cylinder seat, and a through hole is arranged at the center of the other L-shaped surface of the damper mounting seat, and the column of the rubber damper passes through the through hole to directly contact the landing gear torque arm and have an interference fit; the flat plate of the rubber damper is clamped in the gap between the damper mounting seat and the connecting rod hole wall of the connecting rod type cylinder seat;

[0010] Preferably, there are two sets of high-damping cylinder seat connection structures, which are symmetrically installed on the connecting rod type cylinder seat.

[0011] Preferably, the rubber damper is made of high damping rubber material.

[0012] Preferably, the high damping rubber material is hard rubber.

[0013] Preferably, the flat plate of the rubber damper is square.

[0014] Preferably, the column of the rubber damper is a cylinder or a quadrangular prism.

[0015] Preferably, the flat plate size of the rubber damper is 35mmX35mm and the thickness is 3mm.

[0016] Preferably, the length of the column of the rubber damper extending out of the damper mounting seat after passing through the through hole of the damper mounting seat is 3 to 4 mm.

[0017] Preferably, N=2.

[0018] Preferably, the through hole arranged at the center of the other L-shaped surface of the damper mounting seat is circular or square.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention installs a rubber damper between the connecting rod cylinder seat and the landing gear torque arm. During the braking process, the internal friction of the high-damping rubber macromolecular chain segments and the synergistic effect between the chain segments enable the rubber to absorb a portion of the vibration energy. At the same time, the high-damping cylinder seat connection structure proposed by the present invention provides movement resistance, which will dissipate a portion of the energy transmitted to the landing gear torque arm, so that the braking torque is slowly and steadily transmitted to the landing gear torque arm, thereby eliminating and slowing down the shaking phenomenon of the landing gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the high damping cylinder seat connection structure of the present invention.

[0022] Figure 2 The present invention is a schematic diagram of the connection between the torsion arm of the landing gear and the cylinder seat in the prior art.

[0023] Figure 3 It is the front view of the rubber damper structure, where (a) indicates that the column is a cylinder, and (b) indicates that the column is a quadrangular prism.

[0024] Figure 4 It is the left view of the rubber damper structure.

[0025] Figure 5 This is the front view of the damper mounting base.

[0026] Figure 6 This is a right view of the damper mounting base, where (a) indicates that the through hole is circular, and (b) indicates that the through hole is square.

[0027] Among them, 1-connecting rod type cylinder seat, 2-landing gear torque arm, 3-ear piece structure in the prior art, 4-rubber damper, 5-damper mounting seat, 6-screw. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] In order to reduce and eliminate the landing gear vibration problem during aircraft wheel braking in the prior art, the present invention proposes a high-damping cylinder seat connection structure. By adding a rubber damper between the landing gear torque arm and the connecting rod type cylinder seat, the damping between the landing gear torque arm and the connecting rod type cylinder seat can be improved, the influence of braking vibration can be reduced, and thus the stability of the landing gear during braking can be improved.

[0030] like Figure 1 As shown, a high damping cylinder seat connection structure includes a rubber damper 4, a damper mounting seat 5 and a screw 6;

[0031] like Figure 3 and Figure 4As shown, the rubber damper 4 is a T-shaped structure, consisting of a flat plate and a column;

[0032] like Figure 5 and Figure 6 As shown, the damper mounting seat 5 is L-shaped, and one side of the L-shape is provided with two through holes symmetrically along the center line, and the screws 6 pass through the through holes to fix the damper mounting seat 5 on the connecting rod type cylinder seat 1 of the aircraft; the other side of the L-shape of the damper mounting seat is parallel to the connecting rod hole wall of the connecting rod type cylinder seat 1, and a through hole is arranged at the center position of the other side of the L-shape of the damper mounting seat, and the column of the rubber damper 4 passes through the through hole to directly contact the landing gear torque arm 2 and have an interference fit; the flat plate of the rubber damper 4 is clamped in the gap between the damper mounting seat 5 and the connecting rod hole wall of the connecting rod type cylinder seat 1.

[0033] Preferably, there are two sets of high damping cylinder seat connection structures, which are symmetrically installed on the connecting rod type cylinder seat 1.

[0034] Preferably, the rubber damper 4 is made of high damping rubber material.

[0035] Preferably, the high damping rubber material is hard rubber.

[0036] Preferably, the flat plate of the rubber damper 4 is square.

[0037] Preferably, the column of the rubber damper 4 is a cylinder or a quadrangular prism.

[0038] Preferably, the plate size of the rubber damper 4 is 35 mm×35 mm, and the thickness is 3 mm.

[0039] Preferably, the length of the column of the rubber damper 4 extending out of the damper mounting seat 5 after passing through the through hole of the damper mounting seat 5 is 3 to 4 mm.

[0040] Preferably, N=2.

[0041] Preferably, the through hole arranged at the center of the other L-shaped surface of the damper mounting seat is circular or square.

[0042] The present invention is used to connect the landing gear torque arm and the connecting rod type cylinder seat, and is a high-damping vibration reduction structure. In the prior art, the landing gear torque arm and the brake wheel are connected by mechanical parts such as pins. This connection method is a rigid connection. When the braking torque fluctuates, the landing gear torque arm will be immediately affected, thereby causing the landing gear to shake. High-damping rubber is an organic macromolecular chain. The movement of the macromolecular chain is essentially a relaxation process. When subjected to external forces, it can absorb a certain amount of mechanical energy and has a certain damping performance. By installing a rubber damper between the cylinder seat and the landing gear torque arm, during the braking process, the internal friction of the high-damping rubber macromolecular chain segments and the synergistic effect between the chain segments enable the rubber to absorb a portion of the vibration energy, thereby eliminating and slowing down the shaking of the landing gear.

Claims

1. A high damping cylinder seat connection structure, used to connect the landing gear torque arm and the connecting rod type cylinder seat, is a high damping vibration reduction structure, characterized in that: Includes rubber damper, damper mount and screws; The rubber damper is a T-shaped structure, consisting of a flat plate and a column; The damper mounting seat is L-shaped, and one side of the L-shape is provided with N through holes symmetrically along the center line, and the screws pass through the through holes to fix the damper mounting seat on the connecting rod cylinder seat of the aircraft; The other L-shaped surface of the damper mounting seat is parallel to the connecting rod hole wall of the connecting rod type cylinder seat, and a through hole is arranged at the center of the other L-shaped surface of the damper mounting seat, and the column of the rubber damper passes through the through hole to directly contact the landing gear torque arm and have an interference fit; the flat plate of the rubber damper is clamped in the gap between the damper mounting seat and the connecting rod hole wall of the connecting rod type cylinder seat; The high damping cylinder seat connection structure has two sets, which are symmetrically installed on the connecting rod type cylinder seat; the rubber damper is made of high damping rubber material.

2. A high damping cylinder seat connection structure according to claim 1, characterized in that: The high damping rubber material is hard rubber.

3. A high damping cylinder seat connection structure according to claim 1, characterized in that: The flat plate of the rubber damper is square.

4. A high damping cylinder seat connection structure according to claim 1, characterized in that: The column of the rubber damper is a cylinder or a quadrangular prism.

5. The high damping cylinder seat connection structure according to claim 1, characterized in that: The flat plate size of the rubber damper is 35mmX35mm and the thickness is 3mm.

6. A high damping cylinder seat connection structure according to claim 1, characterized in that: The length of the column of the rubber damper extending out of the damper mounting seat after passing through the through hole of the damper mounting seat is 3 to 4 mm.

7. A high damping cylinder seat connection structure according to claim 1, characterized in that: Said N=2.

8. The high damping cylinder seat connection structure according to claim 1, characterized in that: The through hole arranged at the center of the other L-shaped side of the damper mounting seat is circular or square.

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