Mobile Power Tool Stand Fulcrum Folding Mechanism
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Solution Overview
Problem
Existing mobile power tool stands, such as those for table saws, require assistance to switch between extended and received positions due to weight and stability issues, posing safety risks and obstructing pathways with exposed retaining devices.
Innovation Solution
A mobile power tool stand design featuring transverse bars, pivoted legs, links, a locking structure with locating members and retaining devices, and wheels, allowing for easy conversion between positions without assistance and preventing accidental falls or obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the stand is designed to support heavy power tools, then the weight and stability are improved, but it requires assistance to operate and safety risks increase
Solution Approach 1:
The patent employs a fulcrum mechanism that acts as a counterweight system. When the user pulls the handle, the fulcrum provides a pivot point that leverages the stand's own weight and structure to assist in the folding operation. This mechanical advantage allows a single user to overcome the weight of heavy power tools without requiring additional assistance, resolving the contradiction between load-bearing capacity and ease of operation.
Solution Approach 2:
The stand transitions from a static heavy structure to a dynamic system with controlled movement. The fulcrum-enabled folding mechanism allows the stand to dynamically adjust its configuration, transforming the weight that previously hindered operation into an asset that assists the folding process through gravitational force and mechanical leverage.
2Ease of operation
If the stand is designed for solo operation, then ease of operation is improved, but stability and safety during transitions deteriorate
Solution Approach 1:
The retaining device serves as a pre-positioned safety mechanism that cushions and controls the transition process. Before the stand completes its folding motion, the retaining device engages to prevent uncontrolled movement or sudden collapse. This beforehand cushioning ensures that even during solo operation with heavy tools, the transition from extended to received status remains stable and safe.
Solution Approach 2:
The retaining device acts as an intermediary element between the user's manual input and the stand's structural transition. It mediates the folding process by providing controlled engagement points that guide the movement, ensuring stability throughout the transition while allowing solo operation.
3Adaptability or versatility
If the retaining device is exposed during operation, then functionality is maintained, but tripping hazards increase
Solution Approach 1:
The retaining device is segmented into multiple functional components with distinct roles. By dividing the retaining mechanism into separate elements, the patent can position different segments in locations that minimize tripping hazards while maintaining functional accessibility. Critical functional parts remain accessible, while protruding elements are repositioned or redesigned to reduce trip risks.
Solution Approach 2:
The retaining device is repositioned from a horizontal configuration that protrudes outward (creating tripping hazards) to a vertical or recessed configuration. This dimensional change allows the retaining function to be maintained while the device is concealed or positioned in a way that eliminates the tripping hazard during 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
Enables safe, stable, and convenient operation by a single person, preventing falls and avoiding obstacles with the locking structure and wheels, ensuring easy conversion and safe usage.
Implementation Method 1
a pair of first legs each having a fulcrum respectively pivoted to the transverse bars; a pair of links each having a fulcrum respectively pivoted to the transverse bars; a pair of second legs each having a first pivot point respectively pivoted to the links and a second pivot point respectively pivoted to the first legs
Data Source
AI summary
A mobile power tool stand includes two transverse bars for holding a power tool thereon, two first legs respectively pivoted to the transverse bars, two links respectively pivoted to the transverse bars, two second legs respectively pivoted to the first legs and the links for allowing the mobile power tool stand to be set between a received status where the first legs and the second legs are received together, and an extended status where the bottom ends of the first and second legs support the whole structure of the stand on the floor, and a locking structure for selectively locking the mobile power tool stand between the received status and the extended status.