Telescopic Hold Open Rod Locking for Safe Extended Support
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Solution Overview
Problem
Existing hold open rods with telescopic mechanisms lack an effective locking mechanism to prevent accidental retraction from the extended state, posing safety risks when supporting mechanical loads.
Innovation Solution
A locking mechanism comprising a first and second elongate member with a locking member that moves between a first and second position, blocking the first surface from moving into the unlocking region, ensuring the hold open rod remains locked in the extended state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to prevent accidental retraction, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The locking mechanism is designed to automatically engage when the first elongate member is pushed into the second elongate member. The spring automatically pushes the locking member into the locked position when the first surface moves into the locking region, eliminating the need for manual operation or external control systems. This self-service approach improves reliability while minimizing device complexity.
Solution Approach 2:
The patent replaces complex mechanical locking systems with a simpler spring-loaded locking member that uses elastic potential energy storage and release. The spring provides the necessary force to engage and disengage the locking member through the movement of the first surface, substituting complex mechanical actuation with a straightforward elastic mechanism.
2Reliability
If the locking member continuously contacts the first elongate member, then locking reliability is improved, but wear increases reducing component lifetime
Solution Approach 1:
The locking mechanism transitions from static continuous contact to dynamic intermittent contact. The locking member is held out of contact with the first elongate member during normal operation and only makes contact when the first surface moves into the locking region to engage the lock. This dynamic approach ensures reliable locking while minimizing wear during the extended operational cycles when the rod remains locked.
Data Source
AI summary
A locking mechanism for a hold open rod. The hold open rod includes a first elongate member and a second elongate member, slidably arranged to move between a first configuration and a second configuration, the second configuration being extended relative to the first configuration. The mechanism includes a locking mechanism operable between a locked state and an unlocked state and arranged, in the locked state, to prevent the first and second elongate members from returning to the first configuration. The first elongate member includes a first surface. The locking mechanism includes a locking member moveable between a first position and a second position. The locking member includes a second surface.