Clamp Mark Linear Rib Anti-Rotation Design
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Solution Overview
Problem
Existing electric wire integrated clamp marks for wire harnesses in vehicles suffer from tightening play and rotational oscillations due to vibrations, which can lead to reduced holding performance and electrical conduction issues.
Innovation Solution
An electric wire integrated clamp mark with a cylindrical resin body, flange parts, and linear ribs that extend either circumferentially or axially, providing enhanced friction and stability by biting into a cushion member of the clamp, preventing rotation and tightening play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth cylindrical clamp mark is used, then the ease of manufacture is improved, but tightening play occurs and holding strength deteriorates
Solution Approach 1:
The clamp mark transitions from a uniformly smooth cylindrical surface to a structure with localized rib projections. The ribs are concentrated at specific locations (e.g., equatorial region) rather than distributed uniformly, creating local friction enhancement zones while maintaining overall manufacturing simplicity through injection molding processes.
Solution Approach 2:
The rib structures are pre-formed as integral parts of the clamp mark during the molding process, before assembly. This preliminary formation of friction-enhancing features eliminates the need for post-assembly adjustments or additional fastening elements, resolving the contradiction between ease of manufacture and holding strength.
2Device complexity
If a smooth cylindrical clamp mark is used, then the device complexity is reduced, but rotational oscillation occurs due to vibrations
Solution Approach 1:
Rather than making the entire clamp mark surface rough or complex, ribs are strategically placed at specific locations (e.g., 0°, 120°, 240° positions) to create localized resistance to rotational movement. This maintains overall structural simplicity while providing sufficient anti-rotation capability.
Solution Approach 2:
The rib configuration creates an asymmetric friction distribution around the clamp mark circumference. This asymmetric feature profile prevents symmetric rotational oscillation modes, as the ribs engage with the cushion member at specific angular positions to inhibit rotation in both clockwise and counter-clockwise directions.
3Strength
If flange parts are added to the clamp mark, then the holding strength is improved, but the ease of operation deteriorates due to larger size
Solution Approach 1:
Flange parts are added only at the axial end surfaces of the clamp mark, specifically at regions where the wire harness needs to be secured. This localized addition of structural features provides enhanced holding strength at critical positions without requiring a uniform increase in the overall clamp mark dimensions, thus maintaining ease of operation.
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 effectively prevents tightening play and rotational oscillations, ensuring high position accuracy and enhanced holding strength of the electric wires, even under vibrational forces, thereby maintaining electrical conduction performance.
Implementation Method 1
providing enhanced friction and stability by biting into a cushion member of the clamp
Implementation Method 2
preventing rotation and tightening play
Data Source
AI summary
A clamp mark includes a mark main body, flange parts and a linear rib. The mark main body has a cylindrical shape. The mark main body is made of resin material by molding. The mark main body covers a circumference of an electric wire entirely in a circumference direction of the electric wire at a predetermined position of the electric wire in an axial direction of the electric wire. The flange parts are respectively provided on both ends of the mark main body in an axial direction of the mark main body so as to project outward in a radial direction of the mark main body from an outer peripheral surface of the mark main body. The rib is provided on and projected from the outer peripheral surface of the mark main body.