Length limiting tool for aircraft cotter pin
By designing a stepped aircraft cotter pin length limiting tool, the problems of difficulty in cutting cotter pins and the generation of excess materials are solved, efficient and safe cotter pin insurance is achieved, and the installation quality of the aircraft control system and flight safety are ensured.
Patent Information
- Application Number
- CN202422880786.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-26
AI Technical Summary
During aircraft overhaul, cotter pins are difficult to cut and can easily produce excess material, leading to insurance failure and system jamming, affecting flight safety.
A tool for limiting the length of an aircraft cotter pin is designed. The tool adopts a stepped structure. The cotter pin is inserted into the corresponding hole on the ground and the tail end is cut off with diagonal pliers to avoid shearing on the aircraft.
The generation of redundant materials is reduced, the installation quality and work efficiency of the cotter pin insurance are improved, and the safety of the aircraft control system is ensured.
Smart Images
Figure CN223302891U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of aircraft maintenance and relates to a tool for limiting the length of an aircraft cotter pin. Background Art
[0002] During the overhaul of a certain type of aircraft, when performing aircraft control system insurance, HB0-2-A (horizontal) insurance or HB0-2-B (vertical) insurance is generally used. There are (600-800) cotter pin insurances that need to be performed. During the insurance process, the operator needs to use a flat-bladed knife to scrape off the tail of the cotter pin or diagonal pliers to cut off the tail of the cotter pin. The scraped or cut tail of the cotter pin is easy to splash and fall into the working area, especially for insurance in a small space. It is difficult to cut the cotter pin and it is easy to produce excess materials, which will lead to insurance failure, system jamming and other faults, bringing greater quality and safety risks and affecting flight safety. Utility Model Content
[0003] In view of this, the utility model provides an aircraft cotter pin length limiting tool, which inserts cotter pins of various specifications into corresponding specification holes of the limiting tool on the ground, and uses diagonal pliers to cut off the tail end of the cotter pin protruding from the limiting tool hole. By using the tool to secure the cotter pin on the aircraft, the work step of cutting the cotter pin on the aircraft is omitted, the cotter pin can be quickly cut to the required length, the generation of excess materials is avoided, the influence of human factors on the quality of aircraft repair is eliminated, the installation quality of the aircraft control system cotter pin safety is guaranteed, and work efficiency is improved.
[0004] The specific technical solutions of the utility model are as follows:
[0005] A tool for limiting the length of aircraft cotter pins has an overall stepped strip structure. A cotter pin hole is formed on each step surface. The number of steps, i.e., the number of cotter pin holes, and the diameter of each cotter pin hole are determined according to needs. The length of each cotter pin hole is equal to the sum of the diameter of the nut of the cotter pin with the corresponding diameter and the bending length of the cotter pin with the corresponding diameter.
[0006] When in use, insert the cotter pin to be processed into the cotter pin hole of the corresponding specifications in the aircraft cotter pin length limiting tool until it touches the bottom of the cotter pin hole, use diagonal pliers to cut off the tail end of the cotter pin protruding from the cotter pin hole, and take out the cut cotter pin for on-board cotter pin insurance.
[0007] The beneficial effects of the present invention are as follows: the present invention adopts a stepped design according to the characteristics of the cotter pin safety of the aircraft control system, and is suitable for cotter pin safety of various commonly used specifications. The cotter pin is sheared on the ground, which reduces the difficulty of the aircraft cotter pin safety and reduces the risk of generating excess material when shearing the cotter pin. The use of the sheared cotter pin can realize the rapid implementation of the aircraft control system cotter pin safety, optimizes the process method of the cotter pin safety, avoids the generation of excess material, improves work efficiency, and ensures the installation quality of a certain type of aircraft control system. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is the axonometric drawing of the utility model;
[0009] Figure 2 This is a top view of the utility model;
[0010] Figure 3 It is the front view of the utility model. DETAILED DESCRIPTION
[0011] The following is a clear and complete description of the technical solution of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments improved or adjusted by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.
[0012] This embodiment takes a certain type of aircraft control system as an example to provide an aircraft cotter pin length limiting tool, such as Figures 1 to 3 As shown, the aircraft cotter pin length limiting tool is an overall stepped strip structure with a total of 5 step surfaces, and a cotter pin hole is formed on each step surface. According to the 5 commonly used cotter pins installed in a certain type of aircraft control system, the apertures of the 5 cotter pin holes are set to Φ1.0mm, Φ1.5mm, Φ2.0mm, Φ2.5mm and Φ3mm respectively. In other embodiments, cotter pin holes of other specifications can also be expanded; the length of each cotter pin hole is equal to the sum of the nut diameter of the corresponding diameter cotter pin safety and the bending length of the corresponding diameter cotter pin, so as to ensure that the cotter pin safety can be reliably performed.
[0013] When in use, insert the cotter pin to be processed into the cotter pin hole of the corresponding specifications in the aircraft cotter pin length limiting tool until it touches the bottom of the cotter pin hole. Use diagonal pliers to cut off the tail end of the cotter pin protruding from the cotter pin hole, and take out the cut cotter pin for on-board cotter pin insurance.
[0014] The above-described embodiments merely express the implementation methods of the present invention, but they should not be understood as limiting the scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.
Claims
1. A tool for limiting the length of an aircraft cotter pin, characterized in that: The aircraft cotter pin length limiting tool has a stepped strip structure as a whole, and a cotter pin hole is formed on each stepped surface. The diameter of each cotter pin hole is determined according to needs, and the length of each cotter pin hole is equal to the sum of the nut diameter of the corresponding diameter cotter pin insurance and the bending length of the corresponding diameter cotter pin.
2. The aircraft cotter pin length limiting tool according to claim 1, characterized in that: The length of the aircraft cotter pin limits the number of steps of the tool, that is, the number of cotter pin holes is determined according to needs.
3. The aircraft cotter pin length limiting tool according to claim 1, characterized in that: The aircraft cotter pin length limiting tool has a total of 5 stepped surfaces, each of which is provided with a cotter pin hole, and the apertures of the 5 cotter pin holes are 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm and 3 mm respectively.