Test method for trajectory of hydraulic lock of quick adjustment cylinder

By using a servo linear motor system and automated mechanisms, rapid adjustment and impact trajectory testing of aircraft landing gear hydraulic locks was achieved. This solved the problem that existing devices could not simulate different motion trajectories, improved testing efficiency and data accuracy, and ensured aircraft safety.

CN116447197BActive Publication Date: 2026-06-12SICHUAN LINGFENG AVIATION HYDRAULIC MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN LINGFENG AVIATION HYDRAULIC MACHINERY
Filing Date
2023-04-13
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing aircraft landing gear hydraulic lock reliability testing equipment cannot effectively simulate hydraulic lock products with different motion trajectories, resulting in low testing efficiency and failing to meet the reliability requirements of new landing gear door lock rings, thus affecting aircraft safety.

Method used

A test method for rapidly adjusting the collision trajectory of a hydraulic lock with an actuating cylinder was designed. A servo linear motor system and an automated mechanism were used. Through the cooperation of a slide rail and a claw plate, the hydraulic lock hook was automatically adjusted and loaded to simulate the movement trajectory of the landing gear wheel well door lock ring and complete the test of the adjustable lock collision trajectory.

Benefits of technology

It features simple operation, strong compatibility, quick adjustment of the lock trajectory, improved testing efficiency, accurate and reliable data, reduced manual intervention, and applicability to testing various hydraulic lock products.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116447197B_ABST
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Abstract

This invention discloses a test method for rapidly adjusting the impact trajectory of a hydraulic lock with an actuator cylinder. The loading force is controllable, and the impact trajectory is adjustable. This is achieved through the following technical solution: an open-end lock ring box equipped with a hydraulic lock is connected to a force sensor via a load transmission shaft. The load transmission shaft is coaxially connected to a load loading mechanism via a hinge shaft at its end and passing through the first support plate. The load loading mechanism is connected to the equipment loading cylinder and, via a hinge shaft, to an impact angle adjustment hinge through the first support plate. A force sensor coaxially mounted on the load transmission shaft and an open-end lock ring box connected to its end are also connected. A hydraulic lock mounting fixture is laterally connected to the first, second, and third claw disc shafts via bearing seats and connected to the open-end lock ring box via a stepped shaft groove on the second support plate. Together, these components constitute a hydraulic lock loading test device with an actuator cylinder and its impact trajectory adjustment mechanism. This invention can cover the testing of all hydraulic locks with impact radii within the cylinder stroke range.
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