A positioning tool for replacing an inlet pipe of a vertical tail of an airplane
By designing positioning fixtures for the frame, panel, base plate, and support arm, the problem of lower end pipe opening position deviation after the intake pipe is replaced is solved, thereby improving positioning accuracy and work efficiency, and making it suitable for multi-flight positioning.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHU STATE-OWNED FACTORY OF MACHINING
- Filing Date
- 2025-07-09
- Publication Date
- 2026-07-07
AI Technical Summary
In the existing technology, when replacing the vertical tail air intake of an aircraft, there is a lack of special positioning tooling, which causes the position of the lower end of the air intake to deviate after replacement, making it impossible to dock with the airframe.
Design a positioning fixture that includes a frame, panel, base plate and support arm. The positioning hole is aligned with the lower end of the original air intake pipe by bolt connection, which helps to position the new air intake pipe.
Ensure that the lower end of the new air intake pipe is in the same position as the original pipe, eliminating the need for hoisting and inspection, thus improving work efficiency. Furthermore, the tooling is detachable and modular, making it suitable for different sorties.
Smart Images

Figure CN224466129U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tooling technology, and more specifically to a positioning tooling for replacing the air intake of an aircraft vertical tail fin. Background Technology
[0002] The first spars 011 and the second spars 012 of the vertical tail 01 are located within the internal structure of the vertical tail 01. They are relatively rigid and serve as supports and connections, ensuring the stability and strength of the entire structure. The air intakes (forward air intake 013 and rear air intake 014) of the vertical tail 01 are located between the inner and outer skin panels (inner skin 015 and outer skin 016) on both sides of the lower front end of the vertical tail 01, connected by partitions at both ends. See... Figure 1-3 During aircraft repair, the inner skin 015 of the vertical tail 01 needs to be removed to replace the air intake. It is required that the position of the lower end of the air intake after replacement must be consistent with the position of the original air intake. However, the skin and baffle materials around the air intake are relatively soft and do not have sufficient rigidity for the installation and positioning of the new air intake. In addition, there is no special positioning tooling, which causes the position of the lower end of the air intake to deviate after replacement, making it impossible to dock with the fuselage.
[0003] Therefore, providing a positioning fixture for replacing the vertical tail fin air intake of an aircraft is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0004] In view of this, the present invention provides a positioning fixture for replacing the air intake of an aircraft vertical tail fin, ensuring accurate positioning of the replaced air intake.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A positioning fixture for replacing an aircraft vertical tail fin air intake includes a frame, a panel, a base plate, and a support arm. The panel and the base plate are installed on the frame from left to right. The panel has positioning holes. The support arm is installed on the base plate and passes through the frame. The support arm is connected to the first beam of the vertical tail fin by a first bolt, so that the positioning holes correspond to the position of the lower end of the original air intake.
[0007] By adopting the above technical solutions, the beneficial effects of this utility model are as follows:
[0008] It can locate the position of the lower end of the original air intake of the aircraft's vertical tail, assisting in the replacement of the air intake so that the position of its lower end is consistent with the original aircraft, without the need to hoist the vertical tail and dock it with the fuselage for inspection.
[0009] Furthermore, the panel is mounted on top of the frame by a second bolt.
[0010] The beneficial effects of adopting the above-mentioned further technical solution are that the panel can be detached and replaced, and the replacement is convenient, so as to achieve the purpose of replacing and positioning the intake pipe of different flights of the same model.
[0011] Furthermore, the base plate is mounted to the bottom of the frame by a third bolt; the support arm is mounted to the base plate by a fourth bolt.
[0012] The beneficial effects of adopting the above-mentioned further technical solutions are that the modular design is interchangeable, easily damaged parts can be frequently replaced, and positioning accuracy is guaranteed.
[0013] Furthermore, the frame is made of square aluminum material.
[0014] The beneficial effects of adopting the above-mentioned further technical solutions are high stability and resistance to deformation.
[0015] Furthermore, the frame is made of square hollow aluminum material; the panel, the base plate, the support arm, the first bolt, the second bolt, the third bolt, and the fourth bolt are all made of aluminum material.
[0016] The beneficial effects of adopting the above-mentioned further technical solution are that it has a simple structure, is lightweight, can be loaded, unloaded and transported by a single person, improves work efficiency, and will not damage the first beam during use, thus solving the problem of wear and tear on the product caused by the tooling coming into contact with the product.
[0017] Furthermore, the positioning holes include a front positioning hole and a rear positioning hole. When the support arm is connected to the first beam, the front positioning hole corresponds to the position of the lower end of the original front air pipe, and the rear positioning hole corresponds to the position of the lower end of the original rear air pipe. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0019] Figure 1 The attached figure is a structural schematic diagram of the aircraft vertical tail provided by this utility model;
[0020] Figure 2 The attached figure shows the lower front part of the vertical tail fin and the location of the air intake pipe of the aircraft provided by this utility model. Figure 1 A schematic diagram of Part A of the diagram;
[0021] Figure 3The attached figure is a bottom view of the lower front end of the vertical tail fin of the aircraft provided by this utility model;
[0022] Figure 4 The attached figure is a front view of a positioning fixture for replacing the vertical tail fin air intake of an aircraft provided by this utility model.
[0023] Figure 5 The attached figure is a top view of a positioning fixture for replacing the vertical tail fin air intake of an aircraft provided by this utility model. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] like Figure 1-5 As shown in the figure, this utility model discloses a positioning fixture for replacing the air intake of an aircraft vertical tail fin, including a frame 1, a panel 2, a base plate 3, and a support arm 4. The panel 2 and the base plate 3 are installed on the frame 1 from left to right. The panel 2 has positioning holes. The support arm 4 is installed on the base plate 3 and passes through the frame 1. The support arm 4 is connected to the first beam 011 of the vertical tail fin 01 by a first bolt 5, so that the positioning holes correspond to the position of the lower end of the original air intake fin. In this embodiment, the positioning holes include a front positioning hole 21 and a rear positioning hole 22. When the support arm 4 is connected to the first beam 011, the front positioning hole 21 corresponds to the position of the lower end of the original front air intake fin, and the rear positioning hole 22 corresponds to the position of the lower end of the original rear air intake fin. This utility model can locate the position of the lower end of the original air intake fin of the aircraft vertical tail fin, assisting in replacing the air intake fin and ensuring that the position of its lower end is consistent with the original fin, without the need to hoist the vertical tail fin to the aircraft body for docking and inspection.
[0026] To further optimize the technical solution of this utility model, the panel 2 is installed on the top of the frame 1 by the second bolt 6. In this way, the panel 2 can be disassembled and replaced, and the replacement is convenient. It can be used for the replacement and positioning of the air intake pipe of different flights of the same aircraft model (since the position of the lower end of the vertical tail air intake pipe of each flight is different, after the panel 2 is copied on it, the panel 2 cannot be used for other flights. This tooling can remove the used panel 2 from the frame 1 and replace it with a new panel for other flights, thus solving the problem of different product positioning positions for different flights).
[0027] To further optimize the technical solution of this utility model, the base plate 3 is installed at the bottom of the frame 1 by the third bolt 7; the support arm 4 is installed on the base plate 3 by the fourth bolt 8, realizing a modular design, which is interchangeable and allows for frequent replacement of easily damaged parts, ensuring positioning accuracy.
[0028] Specifically, frame 1 is made of square aluminum material, which is highly stable and not easily deformed.
[0029] To further optimize the technical solution of this utility model, the frame 1 is made of square hollow aluminum material; the panel 2, base plate 3, support arm 4, first bolt 5, second bolt 6, third bolt 7 and fourth bolt 8 are all made of aluminum material. The structure is simple and lightweight, weighing no more than 15kg. It can be loaded, unloaded and transported by a single person, which improves work efficiency. Moreover, it will not damage the first beam 011 during use, solving the problem that the tooling will wear down the product when in contact with the product.
[0030] The bolt connection in this utility model refers to a connection method that uses bolts to connect two or more parts or components into a whole, usually used in conjunction with nuts.
[0031] The process of using this utility model:
[0032] The operator connects the support arm 3 to the first beam 011 of the vertical tail fin 01 using the first bolt 5. The operator then replicates the position of the lower end of the original air intake pipe on the panel 2, i.e., opens a positioning hole. When the new air intake pipe is replaced, the lower end of the new air intake pipe coincides with the replicated position on the panel 2, thus ensuring that the position of the lower end of the new air intake pipe is consistent with the position of the original pipe.
[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.
[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A positioning fixture for replacing the air intake of an aircraft vertical tail fin, characterized in that, The device includes a frame, a panel, a base plate, and a support arm. The panel and the base plate are installed on the frame from left to right. The panel has a positioning hole. The support arm is installed on the base plate and passes through the frame. The support arm is connected to the first beam of the vertical tail fin by a first bolt, so that the positioning hole corresponds to the position of the lower end of the original air intake pipe.
2. The positioning fixture for replacing the vertical tail fin air intake of an aircraft according to claim 1, characterized in that, The panel is mounted on top of the frame by a second bolt.
3. The positioning fixture for replacing the vertical tail fin air intake of an aircraft according to claim 2, characterized in that, The base plate is mounted to the bottom of the frame by a third bolt; the support arm is mounted to the base plate by a fourth bolt.
4. The positioning fixture for replacing the vertical tail fin air intake of an aircraft according to claim 1, characterized in that, The frame is made of square aluminum.
5. A positioning fixture for replacing the vertical tail fin air intake of an aircraft according to claim 3, characterized in that, The frame is made of square hollow aluminum material; the panel, the base plate, the support arm, the first bolt, the second bolt, the third bolt, and the fourth bolt are all made of aluminum material.
6. The positioning fixture for replacing the vertical tail fin air intake of an aircraft according to claim 4, characterized in that, The positioning holes include a front positioning hole and a rear positioning hole. When the support arm is connected to the first beam, the front positioning hole corresponds to the position of the lower end of the original front air pipe, and the rear positioning hole corresponds to the position of the lower end of the original rear air pipe.