Non-Circular Piston Rod Assembly for Aerial Vehicle Safety Device
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Solution Overview
Problem
Conventional safety apparatuses for aerial vehicles face difficulties in assembly due to challenges in positioning the center of the push-up member and the piston member, and the risk of the piston rotating together in the cylinder during assembly.
Innovation Solution
The safety apparatus features a piston member with a rod having a non-circular cross-section, which is coupled to the push-up member using a bolt member. This configuration prevents the piston from rotating together in the cylinder and facilitates easier assembly by ensuring precise positioning of the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive bonding or threaded fastening is used to fix the piston member to the push-up member, then the components can be joined, but center positioning becomes difficult when gaps exist and the piston may rotate together in the cylinder making assembly difficult
Solution Approach 1:
The piston member employs a non-circular cross-section (oval, rectangular, or triangular) instead of a conventional circular section. This asymmetric geometry prevents rotation of the piston within the cylinder and enables precise center positioning during assembly, eliminating the need for complex alignment procedures while maintaining strong mechanical connections
2Device complexity
If conventional circular cross-section piston member is used, then the structure is simple, but the piston rotates together in the cylinder during assembly making assembly difficult
Solution Approach 1:
The piston member employs a non-circular cross-section (oval, rectangular, or triangular) instead of a conventional circular section. This asymmetric geometry prevents rotation of the piston within the cylinder and enables precise center positioning during assembly, eliminating the need for complex alignment procedures while maintaining strong mechanical connections
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a safety apparatus that is easier to assemble than conventional systems, reducing assembly complexity and improving the overall efficiency of the safety apparatus in aerial vehicles.
Implementation Method 1
a gas generator that moves the piston member in the cylinder
Data Source
Figure 1
Figure 2(a)~2(g)
Figure 3(a)~3(b)
AI summary
There are provided a safety apparatus and an aerial vehicle including the safety apparatus, in which a lid and an opening end of a container are fixed before operation more firmly than a conventional art to be less susceptible to an external environment. A safety apparatus includes a piston member 10, a cylinder 14 that accommodates the piston member 10 and is provided with a bore 13 through which the piston member 10 protrudes to the outside during operation, a push-up member 15 that is pushed up in one direction by the piston member 10, an ejected object 16 that is pushed up while being supported by the push-up member 15, and a gas generator 17 that moves the piston member 10 in the cylinder 14. A bottomed cylindrical portion 19 of the push-up member 15 has a hole 53, the hole 53 has a substantially identical shape to a shape of one end of a rod 12, and the one end of the rod 12 is fitted to the hole 53. The bottomed cylindrical portion 19 and the rod 12 are fastened and fixed by a bolt member 15.