Ratchet Stand Device Spring-Biased Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lifting devices suffer from safety issues due to unintentional release of the lifting mechanism under load, and most require multiple mechanisms to prevent this, which complicates operation and increases weight.
Innovation Solution
A lightweight jack stand with a stamped foundation and redundant safety features, including spring-biased ratchet surfaces and a separate locking mechanism, to securely support heavy objects and prevent unintentional release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple locking mechanisms are used to prevent unintentional release, then safety is improved, but device complexity increases
Solution Approach 1:
The patent combines the ratchet mechanism and locking mechanism into a single integrated assembly where the locking mechanism directly engages with the ratchet teeth on the post member. This integration reduces the number of separate components while maintaining the safety function through the coordinated action of spring-biased ratchet surfaces and a separate locking mechanism.
Solution Approach 2:
The locking mechanism is divided into distinct functional elements: spring-biased ratchet surfaces that provide continuous engagement, and a separate locking mechanism with a pawl and tooth that provides secure positioning. This segmentation allows each element to perform its specific safety function independently, improving reliability without requiring multiple complete locking systems.
2Reliability
If multiple locking mechanisms are used to prevent unintentional release, then safety is improved, but the device becomes heavier
Solution Approach 1:
By merging the ratchet and locking functions into one integrated mechanism rather than using separate independent locking systems, the patent reduces overall weight while maintaining redundant safety features through the coordinated action of spring-biased surfaces and a locking pawl.
Solution Approach 2:
The spring-biased ratchet surfaces automatically engage with the post member teeth without requiring additional actuators or heavy-duty components. The spring force provides continuous engagement pressure, allowing the use of lighter materials while maintaining safety through the self-actuating nature of the mechanism.
3Weight of moving object
If a stamped foundation member is used, then weight is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The stamped foundation member uses controlled material removal and forming parameters to achieve the required structural integrity and dimensional accuracy. By optimizing the stamping process parameters (force, temperature, tooling design), the patent produces precise geometric features including the aperture alignment and base geometry without requiring post-processing or additional machining operations.
4Reliability
If complementary ratchet surfaces are used, then reliability is improved, but ease of operation decreases
Solution Approach 1:
The spring-biased ratchet surfaces automatically engage with the post member teeth as the post is inserted or adjusted, providing reliable locking without requiring manual intervention. The operator simply needs to insert or adjust the post, and the spring force automatically ensures engagement, maintaining ease of operation while improving reliability.
Solution Approach 2:
The spring-biased ratchet surfaces are pre-positioned and spring-loaded to engage with the post member teeth before any load is applied. This preliminary engagement ensures that the mechanism is already locked and secure before the full weight or force is placed on the stand, improving reliability without requiring additional operational steps.
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 minimizes weight while maximizing strength, ensuring secure support and reducing the risk of unintentional object dislodgment, thereby enhancing user safety and operational simplicity.
Implementation Method 1
spring biased to a contact position
Implementation Method 2
ratchet surfaces and complementary ratchet engaging surfaces
Implementation Method 3
The ratchet member has a laterally directed release handle. The locking rod maintains the position of the post member
Data Source
AI summary
A ratchet stand device includes a base joined to a top member such that congruently aligned openings, allow a post having a plurality of locking teeth on one side wall to be snugly inserted through the aligned openings. A ratchet part is pivotally disposed in a side aperture of the top member. The ratchet member may be released, whereupon, a spring urges the ratchet part back to forcibly engage one of the teeth of the post member. The first position of the ratchet member is safely maintained via a locking rod. The selected position for the post member is maintained irrespective of the weight of an object disposed upon a saddle of the post, until the object is removed and the locking rod is removed.