Light aircraft tail fin

Abstract

The utility model relates to a light airplane tail fin which comprises a light airplane body and a tail fin, the tail fin comprises a tail fin body, a cavity is arranged in the tail fin body, arc-shaped connecting edges are respectively formed on two side edges of the upper portion of the tail fin body, the connecting edges are distributed on two sides of the cavity, two end portions of the connecting edges are respectively formed together, and installation holes are formed. The tail fin body is fixedly connected to the lower surface of the tail of the fuselage; reinforcing blocks are fixedly inserted into the cavities in the middle and rear portions of the tail fin body, a balance cavity is defined by the reinforcing blocks and the rear portion of the tail fin body, a wear-resisting sliding block is fixedly connected to the lower surface of the rear portion of the tail fin body and located under the balance cavity, and the balance cavity is filled with balance mixed liquid. The aircraft tail fin is high in structural strength, and the wear-resistant sliding block is additionally arranged to improve the wear-resistant performance of the aircraft tail fin; meanwhile, the additionally arranged wear-resistant sliding block can be replaced, and the service life of the aircraft tail fin is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft tail fin, more particularly to a light aircraft tail fin. BACKGROUND

[0002] Aircraft tail fin, this is located below the tail of the aircraft fuselage, along the airflow direction carefully arranged knife-shaped fin, although seemingly in flight, actually plays a vital role. It not only concerns the heading stability of the aircraft, also closely linked with the overall safety performance of the aircraft. In the case of aircraft side slip, the role of tail fin is particularly prominent. It can effectively increase the heading stability of the aircraft, ensure that the aircraft can still maintain balance under complex weather conditions, steadily soar in the blue sky. This function is crucial to ensure flight safety.

[0003] In addition, the tail fin also undertakes the important task of offsetting the torque of the fuselage when the propeller rotates. The rotation of the propeller will produce a huge torque, which will cause the fuselage to twist and deform if not effectively offset, thereby affecting the flight performance of the aircraft and the comfort of passengers. The existence of the tail fin is to minimize this adverse effect. More magically, when the aircraft is flying at a large angle of attack, the vertical tail often suffers from "shading" by the wing and fuselage, resulting in a serious decline in its heading stability. The tail fin, due to its unique location and shape, can continue to play a role in stabilizing the heading without being affected by such shading. This is undoubtedly the wisdom of aircraft designers.

[0004] However, the aircraft tail fin is not perfect. During takeoff and landing, due to the angle problem, the tail fin may rub against the ground, causing damage to the tail fin or the aircraft body. In order to avoid this situation, some aircrafts use a design that retracts the tail fin through a control system. But such a design is not foolproof, as any system is at risk of failure; especially for light aircraft, reducing some control system functions is beneficial to the design and safety of the aircraft. Therefore, the existing fixed structure aircraft tail fin can be optimized and improved to reduce friction and damage to the aircraft tail fin. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiencies of prior art, and provides a light aircraft tail fin, which has high structural strength and is additionally provided with wear-resistant sliding blocks to improve the wear resistance of the aircraft tail fin.

[0006] The utility model provides a light aircraft tail fin, including the fuselage and tail fin of light aircraft, the tail fin includes tail fin body, is equipped with the cavity in tail fin body, the arc connecting edge is formed on the both sides of tail fin body upper part respectively, and the connecting edge is distributed in the both sides of cavity, and the both ends of connecting edge are formed together and are formed with mounting hole, and tail fin body is fixed on the lower surface of fuselage tail part;The reinforcing block is inserted and fixed in the cavity of tail fin body middle part and rear part, and the rear part of tail fin body is surrounded and is formed with balance cavity, and the wear -resisting sliding block is fixed on the lower surface of tail fin body rear part, and the wear -resisting sliding block is located the directly below of balance cavity, and the balance mixed liquid is filled in balance cavity.

[0007] Preferably, the connecting edge of the tail fin body middle part is formed with a circular arc front ear plate, and the connecting edge of the rear part is formed with a strip-shaped rear ear plate, and the mounting hole is arranged at the front end of the rear ear plate, the front ear plate and the connecting edge.

[0008] Preferably, the rear end of the tail fin body is formed with a tethering hole, a reinforcing plate is inserted and fixed in the balance cavity at the tethering hole, a metal ring is inserted in the reinforcing plate, and the both ends of the metal ring are respectively inserted and fixed in the tethering hole of the tail fin body.

[0009] Preferably, the bottom of the balance cavity of the tail fin body is provided with a nut plate, a plurality of stepped holes are formed in the wear-resistant sliding block, a bolt is inserted in the stepped hole, and the end of the bolt is screwed and fixed on the nut plate through the tail fin body.

[0010] Preferably, a plurality of foam plates are inserted in the balance cavity of the tail fin body on the upper side of the nut plate, and the balance mixed liquid is arranged in the balance cavity above the foam plates.

[0011] The balance mixed liquid is composed of resin and lead particles.

[0012] Preferably, the wear-resistant sliding block is made of aluminum alloy, a lightning protection pad is inserted in the balance cavity of the tail fin body, the upper end of the lightning protection pad is bent and abuts against the connecting edge of the tail fin body, and the lower end of the lightning protection pad abuts against the nut plate.

[0013] The utility model has the advantages that:

[0014] The aircraft tail fin has high structural strength, the wear-resistant sliding block is additionally arranged to improve the wear resistance of the aircraft tail fin, and the wear-resistant sliding block can be replaced to prolong the service life of the aircraft tail fin. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The utility model is located in the position of the aircraft;

[0016] Fig. 2The utility model discloses a three-dimensional structure schematic diagram.

[0017] Fig. 3 The utility model discloses a partial sectional view schematic diagram.

[0018] In the drawing: 1, fuselage;2, tail fin;21, tail fin body;211, connecting edge;212, mounting hole;213, front lug;214, rear lug;215, tethering hole;22, reinforcing block;23, lightning protection gasket;24, wear-resistant sliding block;241, stepped hole;25, bolt;26, nut plate;27, foam adjusting plate;28, balance mixed liquid;29, reinforcing plate;210, metal ring. DETAILED DESCRIPTION:

[0019] Embodiment: see Figs. 1 to 3 As shown in the figure, a light aircraft tail fin, including light aircraft's fuselage 1 and tail fin 2, tail fin 2 includes tail fin body 21, tail fin body 21 is equipped with the cavity in, the upper portion of tail fin body 21 both sides are formed with the arc connecting edge 211 respectively, connecting edge 211 distribution in the both sides of cavity, the two ends of connecting edge 211 are formed together and are formed with mounting hole 212, tail fin body 21 is fixedly connected on the lower surface of the tail portion of fuselage 1;The cavity in the middle and rear portion of tail fin body 21 is inserted and fixed with reinforcing block 22, and the rear portion of tail fin body 21 is formed with balance cavity by surrounding reinforcing block 22, and the lower surface of the rear portion of tail fin body 21 is fixedly connected with wear-resistant sliding block 24, wear-resistant sliding block 24 is located directly below the balance cavity, and the balance cavity is filled with balance mixed liquid 28.

[0020] The connecting edge 211 of the middle portion of tail fin body 21 is formed with the arc-shaped front lug 213, and the connecting edge 211 of the rear portion is formed with the strip-shaped rear lug 214, and the mounting hole 212 is arranged at the front end of the rear lug 214, the front lug 213 and the connecting edge 211;The mounting hole 212 is inserted with a screw, the screw is screw-connected and fixed on the fuselage 1, and the connecting edge 211 of the tail fin body 21 is fixedly connected on the outer surface of the fuselage 1 by glue, specifically, the screw can be used to position and fix the tail fin 2 on the fuselage 1, and then the glue can be used to improve the connecting strength of the tail fin 2 and the fuselage 1.

[0021] The rear end of tail fin body 21 is formed with a tethering hole 215, the balance cavity at the tethering hole 215 is inserted and fixed with a reinforcing plate 29, the reinforcing plate 29 is inserted with a metal ring 210, the two ends of the metal ring 210 are inserted and fixed in the tethering hole 215 of the tail fin body 21, and the metal ring 210 and the reinforcing plate 29 can improve the strength of the tethering hole 215, the tethering hole 215 can be used to fix the rope in the tethering hole 21 of the tail fin 2, the rope is fixed at the place where the aircraft stays, and then the light aircraft can be prevented from being blown away by the wind in windy weather.

[0022] The bottom of the balance cavity of the tail fin body 21 is provided with a nut plate 26, a plurality of stepped holes 241 are formed on the wear-resistant sliding block 24, a bolt 25 is inserted into the stepped hole 241, and the end of the bolt 25 is screwed and fixed on the nut plate 26. In the above structure, the wear-resistant sliding block 24 is installed and connected to the tail fin body 21 through the bolt 25, and the seriously worn wear-resistant sliding block 24 can be replaced by disassembly. The replaced wear-resistant sliding block 24 can restore the wear resistance of the tail fin 2.

[0023] The balance mixture 28 is composed of resin and lead particles, and the balance mixture 28 in a liquid state can enter the tail fin body 21, and after a period of time, it will solidify, and can play a role in regulating the balance of the whole plane.

[0024] The nut plate 26 is inserted with a plurality of foam plates 27 in the balance cavity of the tail fin body 21 on the upside, and the balance mixture 28 is arranged above the foam plate 27 in the balance cavity. Because the installation and disassembly of the bolt 25 are affected by the solidified balance mixture 28, the foam plate 27 is additionally provided for protection.

[0025] The wear-resistant sliding block 24 is made of aluminum alloy, and the lightning protection pad 23 is inserted into the balance cavity of the tail fin body 21. The upper end of the lightning protection pad 23 is bent and abuts against the connecting edge 211 of the tail fin body 21, and the lower end of the lightning protection pad 23 abuts against the nut plate 26. The lightning protection pad 23 is additionally provided to play a role in lightning protection.

[0026] Working principle: the structure is a light aircraft tail fin, the aircraft tail fin of the application is optimized and improved, and the main improvement point is that the wear-resistant sliding block 24 is installed at the bottom of the aircraft tail fin, so that when the aircraft tail fin rubs, the specific wear position of the aircraft tail fin is the wear-resistant sliding block 24, and the wear-resistant sliding block 24 is based on the wear resistance to reduce the wear.

[0027] When the wear-resistant sliding block 24 rubs, the aircraft tail fin is required to be effectively supported, so the reinforcing block 22 is additionally provided to improve the strength of the tail fin body 21, and the wear-resistant sliding block 24 can be effectively supported.

[0028] The embodiments are used to illustrate the present application, but are not used to limit the present application. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present application, so the protection scope of the present application should be as listed in the claims of the present application.

Claims

1. A light aircraft tail fin, comprising a fuselage (1) and a tail fin (2) of a light aircraft, the tail fin (2) comprising a tail fin body (21) with a cavity formed therein, two arc-shaped connecting edges (211) formed on the upper sides of the tail fin body (21) respectively, the connecting edges (211) being distributed on the two sides of the cavity, the two ends of the connecting edges (211) being formed together and having a mounting hole (212) formed therein, and the tail fin body (21) being fixed to the lower surface of the tail of the fuselage (1); characterized in that: The reinforcing block (22) is inserted and fixed in the cavity of the rear part of the tail fin body (21), the rear part of the tail fin body (21) and the reinforcing block (22) are surrounded to form a balance cavity, the wear-resistant sliding block (24) is fixed on the lower surface of the rear part of the tail fin body (21), the wear-resistant sliding block (24) is located directly below the balance cavity, and the balance cavity is filled with a balance mixed solution (28).

2. A light aircraft tailfin according to claim 1, characterised in that: The arc-shaped front ear plate (213) is formed on the middle connecting edge (211) of the tail fin body (211), the strip-shaped rear ear plate (214) is formed on the rear connecting edge (211), and the mounting hole (212) is arranged at the front end of the rear ear plate (214), the front ear plate (213) and the connecting edge (211); the screw is inserted into the mounting hole (212) and is screwed and fixed on the fuselage (1), and the connecting edge (211) of the tail fin body (21) is fixed on the outer surface of the fuselage (1) by adhesive.

3. A light aircraft tailfin according to claim 1, wherein: The tethering hole (215) is formed at the rear end of the tail fin body (21), the reinforcing plate (29) is inserted and fixed in the balance cavity at the tethering hole (215), the metal ring (210) is inserted into the reinforcing plate (29), and the two ends of the metal ring (210) are respectively inserted and fixed in the tethering hole (215) of the tail fin body (21).

4. A light aircraft tailfin according to claim 1, wherein: The nut plate (26) is arranged at the bottom of the balance cavity of the tail fin body (21), the wear-resistant sliding block (24) is formed with a plurality of stepped holes (241), the bolt (25) is inserted into the stepped hole (241), and the tail end of the bolt (25) is screwed and fixed on the nut plate (26) through the tail fin body (21).

5. A light aircraft tailfin according to claim 4, wherein: The multilayer foam plate (27) is inserted into the balance cavity of the tail fin body (21) on the upper side of the nut plate (26), and the balance mixed solution (28) is arranged in the balance cavity above the foam plate (27). The balance mixed solution (28) is composed of resin and lead particles.

6. A light aircraft tailfin according to claim 5, wherein: The wear-resistant sliding block (24) is made of aluminum alloy, the lightning protection pad (23) is inserted into the balance cavity of the tail fin body (21), the upper end of the lightning protection pad (23) is bent and abuts against the connecting edge (211) of the tail fin body (21), and the lower end of the lightning protection pad (23) abuts against the nut plate (26).

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