Collapsible Stand Pedal Positioning Mechanism
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Solution Overview
Problem
Existing collapsible machine tool stands lack operational convenience and safety due to complex designs and inadequate structural stability, particularly when transitioning between extended and folded positions, and often pose risks to operators due to weight distribution issues.
Innovation Solution
A collapsible stand with a support unit, positioning unit, and control unit, featuring pivotally connected stand legs, a support arm set, rollers, and a pedal-activated mechanism that engages and disengages engagement structures to facilitate easy conversion between positions, ensuring stability and safety through a simple operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stand uses a complex linkage mechanism with multiple pedals and links to achieve collapsible function, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The stand is divided into independent functional modules: the support leg assembly, the tool support assembly, the positioning mechanism with abutment member and bearing member, and the pedal control unit. Each module performs a specific function and can operate independently, simplifying the overall system while maintaining ease of operation.
Solution Approach 2:
The elastic member automatically positions the abutment member to engage with the bearing member, and the pedal mechanism self-activates the positioning function when stepped on. The system uses its own components (elastic member, pedal, abutment member) to achieve the collapsing and stabilizing functions without requiring external complex control systems.
2Stability of the object's composition
If the stand legs are made heavy to ensure structural stability, then the stability is improved, but the ease of operation deteriorates
Solution Approach 1:
The positioning mechanism with abutment member and bearing member is activated before the stand legs are fully collapsed. The abutment member engages with the bearing member in advance to provide stability during the collapsing process, allowing the use of lighter stand legs while maintaining stability throughout the operation.
Solution Approach 2:
The abutment member acts as an intermediary between the stand legs and the tool support assembly. It provides the necessary stability and support during the collapsing operation without requiring the stand legs themselves to be heavy, thus decoupling the stability function from the leg mass.
3Volume of moving object
If the stand is designed to collapse perpendicular to the floor to achieve compact storage, then the volume is reduced, but the operational safety deteriorates
Solution Approach 1:
The positioning mechanism is activated in advance during the collapsing process. The abutment member engages with the bearing member before the stand reaches the fully collapsed position, ensuring stability and safety throughout the transition. This preliminary positioning action prevents dangerous instability that would occur with sudden collapse.
Solution Approach 2:
The stand collapsing mechanism is designed to move dynamically through a controlled path rather than a fixed perpendicular collapse. The pedal mechanism controls the timing and sequence of the collapsing motion, allowing the stand to transition smoothly from extended to collapsed position while maintaining operational safety throughout the dynamic process.
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 design simplifies the operation of collapsing and extending the stand with minimal effort, enhances structural stability, and ensures high operational safety by allowing easy mounting and dismounting of tools, addressing the limitations of prior art by providing a safer and more stable support system.
Implementation Method 1
an elastic member, having two opposite ends respectively abutting on the mounting member and the abutment member
Implementation Method 2
the support arm set is forced by its weight due to gravity to bias backwards
Implementation Method 3
the user simply needs to step on the pedal, which biases the abutment member away from the bearing member
Data Source
AI summary
A collapsible stand mainly includes a support unit including two stand legs pivotally connected together in a crossed manner and a support arm set pivotally connected to one stand leg, a positioning unit including an abutment member and a bearing member respectively mounted at one stand leg and the support art set and so configured that when the collapsible is extended out or collapsed, the abutment member is engaged with a different part of the bearing member, and a control unit mounted at one stand leg and operable to bias the abutment member, moving the abutment member into engagement or away from the bearing member. Thus, the collapsible stand has a simple structure, facilitates operation and ensures a high level of operational safety and structural stability.