Floor Pump Pivot Leg Support with Biasing Mechanism
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Solution Overview
Problem
Existing floor pumps with positioning devices lack convenience and generate insufficient supporting force, often damaging when subjected to heavy loads due to the need for precise alignment of engaging blocks and notch grooves.
Innovation Solution
A floor pump design featuring a supporting device with pivotally connected legs and a pivot mechanism, including a biasing member, cover sleeve, and pull collar, allowing for easy folding and unfolding without precise alignment, and providing stable support through symmetrical flanges and limiting flanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the positioning device uses engaging blocks and notch grooves for folding, then the structure can be compact when folded, but the operation becomes inconvenient and the supporting force is insufficient under heavy loads
Solution Approach 1:
The positioning device is segmented into multiple independent components: engaging blocks on the legs, corresponding notch grooves on the base, and limiting flanges. This segmentation allows each component to perform its specific function independently, enabling easy engagement and disengagement without requiring precise alignment of multiple parts simultaneously.
Solution Approach 2:
The notch groove acts as an intermediary structure that guides and receives the engaging block. The groove's geometry provides a tolerance zone that accommodates manufacturing variations and alignment errors, allowing the engaging block to be inserted easily without precise alignment while still achieving secure positioning.
2Volume of moving object
If the positioning device uses engaging blocks and notch grooves for folding, then the structure can be compact when folded, but the supporting force is insufficient and the device may be damaged under heavy loads
Solution Approach 1:
The invention merges multiple positioning features (engaging blocks, notch grooves, and limiting flanges) into a unified positioning system. The limiting flanges work in conjunction with the engaging blocks and notch grooves to provide both positioning and load-bearing capabilities, distributing the mechanical stress across multiple contact points and preventing device damage under heavy loads.
Solution Approach 2:
The positioning device employs a composite structural approach combining rigid engaging blocks for positioning, flexible notch grooves for tolerance accommodation, and reinforcing limiting flanges for load bearing. This composite structure integrates different functional elements to simultaneously achieve compactness, ease of operation, and high strength.
3Ease of operation
If the legs are allowed to rotate freely when moved away from the base, then the ease of operation is improved, but the stability of the pump is reduced
Solution Approach 1:
The leg support system transitions from a static fixed structure to a dynamic deployable structure. The legs can rotate freely during deployment (when moved away from the base) for ease of operation, but automatically lock into stable positioned configurations when deployed, providing stability during use. This dynamic behavior allows the system to adapt between ease of deployment and operational stability.
Solution Approach 2:
The limiting flanges on the base automatically engage with the legs to provide stability when the legs are in the deployed position. The system self-regulates by providing rotational freedom during deployment but automatically constraining the legs to stable positions when deployed, eliminating the need for external control mechanisms.
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 enhances convenience by eliminating the need for precise alignment and provides stable, high-strength support when the legs are unfolded, while allowing for easy folding without risking damage from heavy loads.
Implementation Method 1
a biasing member, a cover sleeve, and a pull collar. The biasing member sleeves on the axial sleeve. The cover sleeve inserts into the pivot hole and sleeves on the biasing member. One end of the biasing member along the axial direction of the first rotation axis abuts against the axial sleeve and another end of the biasing member abuts against the cover sleeve
Data Source
AI summary
A floor pump includes a main body and a supporting device. The supporting device includes a base and a first leg. The base is fixed to the main body and has a first stopping flange and a second stopping flange. The first leg is pivotally connected to the base to approach or move away from the base. The first leg has a front end and a rear end. When the first leg is approached to the base, the first leg is limited by the first and second stopping flanges to a folded position or an unfolded position. When the first leg is in the folded position, the front end is approached to the main body. When the first leg is in the unfolded position, the front end is distal away from the main body.