A skid landing gear with adjustable stiffness

By embedding a spring plate angle adjuster and mounting joint in the skid landing gear, the spring plate angle can be adjusted, thus solving the ground resonance problem caused by stiffness changes in the skid landing gear. This achieves adjustable and rapid stiffness adjustment, reduces the risk of resonance, and enhances the service life and safety of the skid landing gear.

CN224466112UActive Publication Date: 2026-07-07CHINA HELICOPTER RES & DEV INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA HELICOPTER RES & DEV INST
Filing Date
2025-04-27
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

The helicopter skid landing gear suffers from ground resonance due to poor aircraft parameter matching, excessive onboard weight, and temperature changes causing changes in the stiffness of rubber components, which affects research progress and usage performance.

Method used

Design a skid landing gear with adjustable stiffness. By embedding a spring plate angle adjuster and a spring plate mounting joint in the skid tube assembly, the installation angle of the spring plate can be adjusted to achieve adjustable stiffness of the skid landing gear. The stiffness is enhanced by using aluminum tubes and I-beam reinforcing beams. The ball joint structure in the middle section blocks sand and rainwater. The trailer wheel bolt interface facilitates installation and adjustment.

Benefits of technology

It effectively avoids the risk of breakage caused by repeated deformation and wear of the spring plate, increases functionality, reduces the risk of ground resonance, achieves rapid adjustment and sealing effect, and can withstand impact and fatigue loads.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a skid landing gear with adjustable stiffness, comprising: two sets of slide tube assemblies, at least two cross tube assemblies, and bolt and nut assemblies; at least two cross tube assemblies are arranged front and rear along the flight direction; the two sets of slide tube assemblies are symmetrically connected to both sides of each cross tube assembly; in each set of slide tube assemblies, a spring plate angle adjuster and a spring plate mounting joint are embedded in the rear end of the slide tube and connected to a spring plate; multiple spring plate angle adjusters configured in each set of slide tube assemblies have end tilt planes with different angles, and by replacing spring plate angle adjusters with different end tilt plane angles, the mounting angle of the spring plate mounting joint and the spring plate is adjusted, thereby adjusting the stiffness of the skid landing gear. This invention solves the problem of ground resonance in helicopters caused by changes in the stiffness of rubber parts due to poor aircraft parameter matching, excessive onboard weight, and temperature changes in existing skid landing gear.
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