Effort-Saving Hand Tool Parallel Press Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing effort-saving hand tools often have complex designs that lead to higher production costs and increased likelihood of malfunction, and they do not apply force equally to the connection terminal due to varying angles during press connections.
Innovation Solution
A hand tool with a simple structure comprising a first shaft, a second shaft, a connection shaft, and a third shaft forming a V or Y shape, along with a ratchet mechanism and eccentric axis, which provides a mechanical advantage for reduced effort and equal force application during parallel press connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a general effort-saving hand tool with two shafts pivoted to each other is used, then the press connection function is achieved, but the angle between shafts varies greatly during operation causing non-parallel press connection and unequal force application
Solution Approach 1:
The patent applies a four-bar linkage mechanism with specifically designed link lengths that dynamically maintain parallelism between the input and output shafts throughout the entire range of motion. This dynamic geometric constraint ensures that the shafts remain parallel during operation, resolving the technical contradiction between achieving press connection function and maintaining parallel press connection precision.
2Adaptability or versatility
If different types of effort-saving hand tools are used, then various functions are achieved, but the designs become complex entailing higher production costs and increased likelihood of malfunction
Solution Approach 1:
The patent achieves versatility through a modular attachment system where different loading parts can be attached to the standardized four-bar linkage mechanism. The core parallel mechanism serves multiple functions (press connection, cutting, etc.) by simply changing the loading attachments, avoiding the need for completely different complex designs for each function. This resolves the contradiction between adaptability and device complexity.
3Ease of manufacture
If a simple structure hand tool is used, then production costs are reduced, but the ability to provide mechanical advantage for reduced effort may be compromised
Solution Approach 1:
The four-bar linkage mechanism provides dynamic mechanical advantage through its geometric configuration. The parallel linkage design creates force multiplication while maintaining structural simplicity with only four connected members. This resolves the contradiction between ease of manufacture and provision of mechanical advantage by achieving force multiplication through pure geometric design rather than complex 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 tool reduces the effort required for press connections by utilizing lever arms and a toggle mechanism to maintain a parallel force application, minimizing damage to the connection terminal and simplifying the design for lower production costs.
Implementation Method 1
The effort-saving hand tool comprises a first shaft, a second shaft, a connection shaft, and a third shaft... provides a mechanical advantage for reduced effort
Implementation Method 2
The first shaft and the second shaft form a V or Y shape... maintain a parallel force application
Data Source
AI summary
An effort-saving hand tool includes a first shaft, a second shaft, a connection shaft, and a third shaft. The first shaft has a first end, a second end, and a pivot point located between the first end and the second end. The second end of the first shaft includes a first loading part. The second shaft has a first end and a second end. The pivot point of the first shaft is pivoted to the first end of the second shaft. The second end of the second shaft includes a second loading part. The connection shaft has a first end pivoted to the first shaft. The third shaft has a slender rear part, a first side, and a second side. The first side of the third shaft is pivoted to the second shaft. The second side of the third shaft is pivoted to a second end of the connection shaft.