Sharpening Device Elastic Bracket Extraction
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Solution Overview
Problem
Existing sharpening devices with crossed sharpening bows are complex and costly to manufacture due to the need for installation openings and bends in the sharpening bow arms, which complicates assembly and increases the risk of damage from lateral forces.
Innovation Solution
The sharpening brackets are articulated with one arm on the base body and the other arm supported exclusively, eliminating the need for installation openings and bends, allowing for a simplified structure with adjustable elastic restoring force, enhanced durability, and ergonomic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sharpening brackets are articulated on both sides with rotatable bends in installation openings, then the sharpening device achieves elastic return through torsion effect, but the manufacturing becomes complex and cost-intensive
Solution Approach 1:
The invention extracts the rotatable bend from the sharpening bracket arm and relocates it to the base body as a bearing element. This separates the rotational function from the bracket arm, eliminating the need for complex bends in the bracket arms themselves and simplifying their manufacturing while maintaining the torsion spring functionality
Solution Approach 2:
The invention introduces a bearing element as an intermediary component between the sharpening bracket arm and the base body. This bearing element mediates the rotational movement, allowing the bracket arm to pivot without requiring complex bends, thus simplifying manufacturing while ensuring reliable elastic return
2Ease of operation
If installation openings are made in the base body for rotatable mounting, then the sharpening brackets can be articulated, but the assembly becomes more complex and time-consuming
Solution Approach 1:
The invention extracts the rotational mounting function from the base body's installation openings and places it in separate bearing elements. This allows the bearing elements to be pre-assembled or pre-positioned, reducing the need for complex opening-making operations during final assembly and reducing assembly time
Solution Approach 2:
The invention segments the mounting system into separate components: the base body, the bearing elements, and the sharpening bracket arms. This segmentation allows each component to be manufactured and prepared independently, then assembled more quickly and easily, reducing overall assembly complexity and time
3Ease of operation
If bends are provided at the free ends of sharpening bow arms, then the axis of rotation is formed, but the structure becomes more complex and vulnerable to damage
Solution Approach 1:
The invention extracts the rotational axis function from the bend in the sharpening bracket arm and relocates it to a bearing element mounted on the base body. This removes the structural weakness of bends from the bracket arms, making them more resistant to lateral forces while preserving the necessary rotation capability
Solution Approach 2:
The invention provides beforehand cushioning by using bearing elements that are specifically designed to handle lateral forces and rotational movements. These bearing elements are pre-installed to absorb and accommodate lateral forces that would otherwise damage the sharpening bracket arms, ensuring greater reliability
4Ease of manufacture
If the sharpening device uses a simplified structure without installation openings, then manufacturing and assembly are simplified, but the overall height may increase
Solution Approach 1:
The invention addresses the height issue by optimizing the spatial arrangement of the bearing elements and sharpening bracket arms. The bearing elements are mounted on the base body in a manner that allows the sharpening bracket arms to pivot without requiring excessive vertical space, thus maintaining a compact overall height while achieving simplified manufacturing
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
This design simplifies manufacturing, reduces costs, enhances handling safety, and achieves a high-quality, reproducible sharpening result while being robust against damage and suitable for corrosive environments.
Implementation Method 1
an elastically resilient restoring force which is generated by elastic deformation, in particular torsion, of the sharpening brackets
Implementation Method 2
The sharpening brackets are designed as torsion spring elements and each have two sharpening bracket arms which are connected to one another at one end
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a sharpening device (10) for the blade of a cutting tool, comprising a plate-shaped base body (12) which has a guide slot (14) for a blade to be sharpened. Sharpening bars (20, 22) are pivotably mounted on the base body, on both sides of the guide slot (14). The sharpening bars (20, 22) each have two sharpening bar arms (20a, 20b, 22a, 22b) that are connected to each other at one end, wherein the sharpening bars (20, 22) can pivot out of their respective rest position by means of a pressure against an elastic return spring force created by an elastic deformation, in particular torsion, of the sharpening bars (20, 22) when the blade is introduced into the guide slot (14). The sharpening bars (20, 22) grip the base body (12) in each case with their two sharpening bar arms (20a, 20b, 22a, 22b), wherein the sharpening bars (20, 22) are, according to the invention, each pivotably mounted on the base body (12) with only one of their sharpening bar arms (20a, 22b) and are only supported on the base body (12) by the other respective sharpening bar arm (20a, 22b).