Blade Sharpener Clamping Assembly with Spring-Buffered Jaw Control
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Solution Overview
Problem
Existing clamping assemblies for knife sharpeners require cumbersome adjustments to accommodate blades of different thicknesses, often leading to inadequate clamping force or surface marring, and lack smooth lever movement during operation.
Innovation Solution
A clamping assembly with a spring piston mechanism that buffers clamping force and includes adjustable jaws with tines for varying blade geometries, featuring a lever system with a wedge and linkage for controlled jaw closure, allowing for smoother operation and secure blade retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional clamping assemblies are used with fixed jaw spacing, then the structure is simple, but they cannot accommodate blades of different thicknesses and provide inadequate clamping force
Solution Approach 1:
The patent implements dynamic adjustability through a threaded rod mechanism that allows the jaw spacing to be changed dynamically. The threaded rod with threaded holes in the jaw and nut assembly enables continuous adjustment of the distance between jaws, transforming a static structure into a dynamic one that can adapt to different blade thicknesses while maintaining operational simplicity.
Solution Approach 2:
The patent changes the critical parameter of jaw spacing through the threaded rod mechanism. By adjusting the position of the threaded rod within the threaded holes and manipulating the nut assembly, the physical distance between jaws can be precisely controlled, allowing adaptation to various blade thicknesses without complicating the overall device structure.
2Reliability
If high clamping force is applied to secure blades, then blade retention is improved, but surface marring occurs
Solution Approach 1:
The patent applies local quality by providing multiple gripping surfaces at different locations on the jaws. The first and second gripping surfaces are positioned at different distances from the hinge axis, allowing differential application of clamping force. This enables secure retention of the blade while distributing the pressure to prevent surface marring, particularly on the blade's cutting edge.
Solution Approach 2:
The clamping force is segmented into multiple application points through the multiple gripping surfaces. Instead of applying a single concentrated force that could mar the blade surface, the force is distributed across multiple surfaces at different positions, reducing the pressure at any single point while maintaining overall clamping security.
3Adaptability or versatility
If manual adjustment of jaw spacing is required for each blade thickness, then adaptability is achieved, but operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent implements self-service through the spring-loaded mechanism that automatically maintains optimal jaw spacing. The spring assembly continuously pushes the jaws together with sufficient force to secure the blade, eliminating the need for the user to manually adjust or apply force during operation. The system serves itself by maintaining constant pressure through the spring's elastic force.
Solution Approach 2:
The spring assembly acts as an intermediary between the jaw structure and the blade. Instead of requiring direct manual intervention to maintain jaw spacing or apply clamping force, the spring mediates this function by continuously providing the necessary force, thereby simplifying operation while maintaining adaptability to different blade thicknesses.
4Ease of operation
If the lever moves directly without buffering mechanism, then the structure is simple, but operation lacks smoothness and control
Solution Approach 1:
The patent applies beforehand cushioning by incorporating a spring assembly that pre-load buffers the lever movement. The spring continuously cushions the interaction between the lever and the blade, absorbing shocks and providing smooth, controlled movement. This prevents direct impact and ensures gentle, progressive clamping action while maintaining structural simplicity.
Solution Approach 2:
The spring assembly serves as an intermediary between the lever and the blade during the clamping process. It mediates the force transmission, providing smooth and controlled movement by absorbing and distributing the mechanical energy, thereby enhancing operational smoothness without significantly complicating the lever mechanism structure.
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 assembly provides stable, secure clamping of blades with reduced manual effort, minimizing surface damage and ensuring consistent sharpening results across varying blade thicknesses and geometries.
Implementation Method 1
A clamping assembly with a spring piston mechanism that buffers clamping force
Implementation Method 2
A wedge can be advanced between the proximal ends of the jaws along a central clamp axis by moving a lever from a first position to a second position
Implementation Method 3
the wedge comprises a yoke with cams attached to the yoke with a pin so that each cam can pivot about the pin as the cam engages the inside surface of the jaw
Data Source
AI summary
A clamping assembly includes a base defining a spring well. A spring piston assembly is received in the spring well and includes a spring and a piston body. First and second jaws are supported over the base on opposite sides of a central clamp axis that extends vertically through the spring piston and between the jaws, where the jaws are pivotable between an open position and a closed position. A wedge is movable along the central clamp axis between an end of the jaws. A lever has an elongated lever body extending to an end portion defining an L-shape with a toe and a heel, the end portion positioned between the wedge and the spring piston with the toe pivotably connected to the wedge and the heel coupled to the piston body via a linkage. The lever is operable to move the wedge along the central clamp axis.