Spring-Biased Column Hinge Assembly for Controlled Maintenance Tilting
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Solution Overview
Problem
Existing lamppost and column hinge systems are unsafe and inefficient for maintenance access, as they often rely on operator strength, complex mechanisms, or prone to accidental activation, and lack effective safety features to prevent unauthorized tilting or damage.
Innovation Solution
A hinge assembly with a connecting means linked via pivot axes and a bias means, such as a spring, that allows controlled lowering and raising of the column for maintenance, featuring a cover and shield member for security and prevention of accidental movement, and a counterweight mechanism for easy load fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rope or cord mechanism is used to lower and raise the upper portion, then the operator can control the movement, but the method is intrinsically unsafe and relies on operator strength and control
Solution Approach 1:
The spring mechanism automatically provides the force to raise the upper portion without operator intervention, while the operator only needs to control the lowering process. The system serves itself by using the stored spring energy to perform the lifting action, eliminating the need for operator strength to raise the load.
Solution Approach 2:
The spring acts as a counterweight mechanism, storing energy when compressed during the lowering phase and releasing it to lift the upper portion during the raising phase. This balances the weight of the upper portion, making the operation safer and reducing the effort required from the operator.
2Reliability
If a piston mechanism is used to control the fall of the upper portion, then the fall can be controlled and slowed, but the piston unit must be transported to each post and is complex
Solution Approach 1:
The spring mechanism is integrated into the existing hinge assembly structure, combining the safety function of controlled descent with the structural components already present. The rod connects the spring to the hinge assembly, merging multiple functions into a unified, simpler mechanism that eliminates the need for separate piston units.
Solution Approach 2:
The complex piston mechanism is extracted and replaced with a simpler spring-based system. The essential function of controlling the descent is extracted from the complex piston design and achieved through the spring's mechanical properties, reducing overall device complexity.
3Reliability
If a door is provided to prevent unauthorized tilting, then safety is improved, but the door must be detached to allow tilting, resulting in possible loss or damage of the door
Solution Approach 1:
The cover transitions from a static protective element to a dynamic component that moves with the hinge assembly. When the hinge is in the upright position, the cover protects the mechanism; when the hinge is tilted for maintenance, the cover moves accordingly and remains attached, eliminating the risk of loss or damage.
Solution Approach 2:
The cover serves multiple functions: it protects the hinge mechanism from unauthorized access and damage when the column is upright, and it moves with the hinge assembly when tilted for maintenance. This multi-functionality eliminates the need for separate door retention mechanisms.
4Ease of manufacture
If chains are used to connect the upper portion to the spring arrangement, then the connection is provided, but chains are complex and often comprise weak regions or links
Solution Approach 1:
The rod is designed as a simple, robust component that can be easily manufactured and replaced if needed. Unlike chains with multiple potential failure points, the rod provides a single, strong connection that is simpler in design and more reliable in operation.
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 provides a safe, efficient, and secure method for accessing and maintaining lampposts by ensuring controlled movement and preventing unauthorized access, while allowing easy fitting and adjustment of loads, enhancing user safety and reducing the risk of accidents.
Implementation Method 1
the connecting means is associated with a bias means that exerts a force via the connecting means, which urges the upper and lower hinge assembly portions towards the normal position
Implementation Method 2
the upper portion of the post is directly connected to a yoke bearing a rod that exerts pressure onto a spring
Data Source
AI summary
A column includes a hinge assembly, the hinge assembly having an upper portion (2) pivotally attached to a lower portion (1) for movement about a first pivot axis (5), the upper portion of the hinge assembly being associated with an upper part (12) of the column and the lower portion of the hinge assembly being associated with a lower part (11) of the column. In use, movement of the upper and lower hinge assembly portions about the first pivot axis from a normal position, in which the upper part of the column is relatively upright, causes the upper part of the column to rotate towards the lower part of the column, thereby allowing the upper part the column to be moved to a maintenance position. An arm links (3), via second (6) and third (7) pivot axes, the upper and lower portions of the hinge assembly, and the arm is associated with a spring (9) that exerts a force via the arm, which urges the upper and lower hinge assembly portions towards the normal position.