Telescoping Member Locking Mechanism with Synchronizing Ring
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Solution Overview
Problem
Existing telescoping member locking mechanisms face challenges in securely locking the inner member in a desired position within the outer member, particularly in distributing axial loads and preventing binding due to misalignment, which can lead to bending stresses and reduced load capacity.
Innovation Solution
A locking mechanism with multiple locking pins supported by a synchronizing ring, allowing for simultaneous engagement and disengagement, and utilizing spring bias and lost-motion connections to distribute loads and prevent binding, while maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single locking pin is used to lock the inner telescoping member, then the device complexity is reduced, but the reliability of locking and load distribution is insufficient
Solution Approach 1:
The locking mechanism is segmented into multiple locking pins (at least two pins) distributed around the telescoping member. Each pin independently engages with the outer telescoping member, distributing the locking function across multiple elements. This segmentation improves reliability by ensuring that if one pin fails or is misaligned, others can still provide secure locking, while the modular nature keeps individual pin complexity low.
Solution Approach 2:
Multiple locking pins are merged into a single synchronized operation through the synchronizing ring mechanism. The synchronizing ring connects all locking pins, allowing them to engage or disengage simultaneously through a single actuating motion. This merging of operations maintains device complexity at an acceptable level while achieving reliable multi-point locking.
2Reliability
If locking pins are positioned to engage detents in the outer telescoping member, then the inner member is securely locked, but misalignment can cause bending stresses and reduce load capacity
Solution Approach 1:
The locking load is segmented and distributed across multiple locking pins positioned at different angular locations around the telescoping member. This distribution prevents any single pin from bearing excessive concentrated loads that would cause bending stresses. The pins collectively share the axial load, maintaining both locking security and individual pin strength.
Solution Approach 2:
The locking pins are positioned asymmetrically around the telescoping member rather than all in one location. This asymmetric distribution around the central axis allows the structure to better handle off-center loads and misalignment conditions, as the pins collectively resist moments and lateral forces, preventing bending stresses on individual pins.
3Strength
If multiple locking pins are used to distribute axial loads, then the load capacity is enhanced, but the mechanism complexity and space requirements increase
Solution Approach 1:
Multiple locking pins are merged into a unified mechanism through the synchronizing ring, which connects all pins and enables them to operate simultaneously. This merging allows multiple pins to provide enhanced load capacity while being controlled by a single actuating motion, thereby managing mechanism complexity. The synchronizing ring integrates the multiple pins into one coordinated system rather than requiring separate control for each pin.
Solution Approach 2:
The locking pins and synchronizing ring mechanism are arranged in a nested configuration where the pins are positioned radially around the central axis and the synchronizing ring encircles them. This nesting allows the multiple locking elements to occupy minimal space while working together, enhancing axial load capacity without proportionally increasing the overall mechanism volume or complexity.
4Ease of operation
If the locking pins are spring-biased toward extended positions, then automatic engagement is achieved, but the device complexity increases due to additional springs and biasing mechanisms
Solution Approach 1:
The locking pins are equipped with spring biasing that enables them to automatically engage with the outer telescoping member without requiring manual intervention. When the inner telescoping member is inserted, the springs automatically drive the pins into the extended locked position. This self-service mechanism achieves automatic engagement while keeping the complexity limited to simple spring-pins rather than complex actuating systems.
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 effectively locks the inner telescoping member in place, distributes axial loads, and reduces the likelihood of binding, enhancing the load capacity and stability by ensuring secure engagement and easy disengagement of the locking pins.
Implementation Method 1
The locking pins may be spring-biased toward their respective extended positions so that they will be driven into their respective extended positions when the inner telescoping member is moved to a position with the outer telescoping member where the locking pins are aligned with respective detents in the outer telescoping member.
Implementation Method 2
The locking mechanism may include first and second compression springs that may be positioned to bias the respective first and second locking pins toward their respective extended positions.
Data Source
AI summary
An apparatus for locking an inner telescoping member into a desired position within an outer telescoping member or sleeve. A locking mechanism is carried by the inner telescoping member and includes locking pins supported for motion between respective retracted positions and respective extended positions engaging detents in the outer telescoping member. A synchronizing ring is operatively connected to the locking pins such that synchronizing ring rotation moves the locking pins between the locking pins' respective retracted and extended positions.