Jackstand Cart Cantilever Spring for Ergonomic Stable Placement
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Solution Overview
Problem
Existing jackstands are heavy and require lifting from an ergonomically suboptimal posture, affecting their ease of placement and stability.
Innovation Solution
A cart with a shelf and cantilever mechanism, featuring elastic deformation or spring-loaded hinges, that transfers loads to wheels, optimizing ergonomic use and stability by adjusting clearance based on load weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If jackstands are made robust to support large weight, then stability and capacity are improved, but weight to move by hand increases
Solution Approach 1:
The jackstand is divided into two separate components: a stationary robust base structure for supporting weight and a separate movable cart for transport. The cart carries the jackstand on its shelf, allowing the heavy jackstand to be moved easily without compromising the stability of the base when in use.
Solution Approach 2:
The cart acts as an intermediary between the user and the heavy jackstand. Instead of the user directly handling the heavy jackstand, they interact with the lighter cart, which transfers the jackstand to the desired location and provides ergonomic lifting points.
2Strength
If jackstands are made robust to support large weight, then capacity is improved, but ease of operation deteriorates
Solution Approach 1:
The system separates the high-capacity jackstand from the operation interface. The cart provides ergonomic handles and a shelf for easy placement, while the jackstand itself remains a stable, high-capacity support structure that doesn't need to be manually lifted.
Solution Approach 2:
The cart serves as an intermediary tool that provides ergonomic operation characteristics (light weight, easy handling) while carrying the high-capacity jackstand. This mediator allows users to operate the system easily without directly handling the heavy, high-capacity jackstand.
3Ease of operation
If clearance distance is maximized under zero load, then ease of movement is improved, but stability under load deteriorates
Solution Approach 1:
The cantilever mechanism provides dynamic adjustment of clearance distance based on load conditions. Under zero or light load, the cantilever maintains maximum clearance for easy movement. When load exceeds the threshold, the spring-loaded hinge compresses, dynamically reducing clearance to minimize the gap between the jackstand base and terrain, thereby improving stability.
Solution Approach 2:
The clearance distance parameter changes dynamically based on applied load. The spring-loaded hinge in the cantilever mechanism allows the clearance distance to vary from maximum (under zero load) to minimum (under threshold load), optimizing both ease of movement and stability under different operating conditions.
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 easy, ergonomic, and stable placement of jackstands without compromising stability, allowing safe movement when loads exceed a threshold, protecting the cart's structural integrity.
Implementation Method 1
The cantilever elastically deforms when subjected to the received load such that the clearance distance is correlated to the received load
Implementation Method 2
the spring-loaded hinge compresses when subjected to a received load such that the clearance distance is correlated to the received load
Data Source
AI summary
A cart suitable to support an automotive jackstand via a shelf, the shelf supported by a number of wheels coupled to the shelf using a cantilever. The cantilever exhibits elastic behavior in response to loads received by the shelf. In one embodiment, the cantilevers exhibit elastic behavior via a joint. In another embodiment, the cantilevers exhibit elastic behavior via a spring bolt.