Hose Clamp Anti-Rotation Mechanism Prevents Hose Deformation
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Solution Overview
Problem
Existing hose clamp structures for securing fuel hoses to pipes in motor vehicles often require both hands to operate, leading to difficulties in tight spaces and can cause deformation or cracking of the hose due to anti-rotation engaging portions pressing against the hose wall, compromising sealing and securing properties.
Innovation Solution
A hose clamp holding structure featuring an anti-rotation engaging portion and a deformation restraining mechanism that prevents the engaging portion from deforming the hose during tightening, allowing for secure positioning and tightening without causing forced deformation or cracking, using a combination of annular clamp bodies, engaging holder portions, and deformation mechanisms to maintain the hose's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an anti-rotation engaging portion is provided on the clamp body to position the hose clamp circumferentially, then the hose clamp can be positioned and held in circumferential direction, but the engaging portion is pressed against the hose wall during tightening causing deformation or cracking
Solution Approach 1:
A deformation restraining mechanism is introduced as an intermediary component between the anti-rotation engaging portion and the hose. This mechanism restrains the engaging portion from being pressed against the hose wall during tightening, thereby preventing hose deformation and cracking while maintaining the positioning function
Solution Approach 2:
The deformation restraining mechanism is designed to prevent hose deformation before it occurs during the tightening process. By restraining the engaging portion's movement toward the hose wall, the mechanism proactively counteracts the harmful pressing action that would otherwise cause deformation or cracking
2Strength
If the clamp body is diametrically contracted to tighten the hose to the pipe, then the securing strength is improved, but the anti-rotation engaging portion moves circumferentially and presses against the hose
Solution Approach 1:
The deformation restraining mechanism acts as an intermediary that decouples the tightening action from the harmful circumferential movement of the engaging portion. It allows the clamp body to contract diametrically for tightening while preventing the engaging portion from moving circumferentially and pressing against the hose
3Ease of manufacture
If both hands are required to rotate the operation screw and hold the hose clamp, then the tightening operation can be performed, but it becomes difficult to operate in narrow engine compartments
Solution Approach 1:
The deformation restraining mechanism is designed to automatically engage and function during the tightening process without requiring manual intervention. The mechanism self-activates when the clamp body contracts, restraining the engaging portion and preventing hose deformation without needing additional manual operations
Data Source
AI summary
A hose clamp has an annular clamp body to be fitted on a clamp mounting portion of an end portion of a hose, and the clamp body is configured so as to tighten the clamp mounting portion by diametrically contracting the clamp body. A holding structure of the hose clamp has an anti-rotation engaging portion on the clamp body, an engaging holder portion on the hose, and a deformation restraining mechanism for restraining deformation of the hose when the clamp body tightens the clamp mounting portion. The engaging holder portion engages with the anti-rotation engaging portion in a circumferential direction when the clamp body is fitted on the clamp mounting portion. The deformation restraining mechanism restrains that the anti-rotation engaging portion is pressed against the engaging holder portion and thereby the hose is deformed via the engaging holder portion.