Hand Pliers Pivot Bearing With Edge-Opening Lug Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of hand pliers tools is complex due to the requirement of multiple components and precise alignment for the pivot bearing, which increases the number of components and assembly complexity.
Innovation Solution
The pivot bearing is formed using a bearing pin and a bearing lug with an edge opening, allowing for a simpler assembly without the need for additional securing elements, and optionally using a bearing bolt with closed edges to secure the assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional pivot bearing with multiple components and securing elements is used, then the connection is secure, but the assembly complexity and number of components increase
Solution Approach 1:
The bearing pin and bearing lug are merged into a single integrated component where the bearing pin is formed as an integral part of the pliers jaw. This eliminates the need for separate securing elements like snap rings or additional bolts, reducing the number of components while maintaining the secure connection through the inherent geometric interlocking of the integrated design
Solution Approach 2:
The bearing pin serves multiple functions simultaneously: it acts as a pivot axis for rotation, provides structural support, and its integrated formation with the pliers jaw serves as its own securing mechanism. This multi-functionality eliminates the need for dedicated securing elements, simplifying the assembly while ensuring reliable connection
2Manufacturing precision
If precise alignment is required for the pivot bearing, then the connection is accurate, but the assembly process becomes more complex
Solution Approach 1:
The bearing pin is pre-formed as an integral part of the pliers jaw during the manufacturing process, with its geometry precisely defined in advance. The bearing lug is designed with predetermined dimensional relationships that ensure correct alignment when assembled, eliminating the need for complex alignment procedures during final assembly
3Strength
If multiple components are used for the pivot bearing, then the design is robust, but the number of components increases
Solution Approach 1:
The bearing pin is merged with the pliers jaw as an integral component, eliminating separate parts. The bearing lug is designed as a single piece with the opposing component. This merging reduces the total number of components from multiple separate parts to just two main components, while the robustness is maintained through the strengthened integral construction and optimized geometric interlocking
Data Source
AI summary
The invention relates to a hand pliers tool which might be embodied as crimping pliers, tube pressing pliers or cutting pliers. According to the invention, pliers pivoting parts are not (exclusively) connected to each other for being pivoted by bearing bolts arranged in bearing bores. Instead, pivot bearings are formed by bearing lugs having edge openings by which it is possible to insert a bearing pin into the bearing lug.