Hose Clamp Lug Fastening With Clearance Gap for Diameter Adaptation
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Solution Overview
Problem
Conventional hose clamp tightening devices require band portions with specific curvatures for each belt diameter, complicating manufacturing and supply, and the uniformity of belt curvature is affected during tightening, leading to local stiffening.
Innovation Solution
A tightening device with a belt and band portions featuring a first fastening area on a boss with a clearance gap between the band portion and the belt, allowing for tilting and adaptable fastening, enabling use with different belt diameters without continuous contact, and decorrelating deformations during tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If band portions with specific curvatures are used for each belt diameter, then the fastening precision is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The band portion is designed with a universal flat inner face that can accommodate multiple belt diameters through the clearance gap mechanism, eliminating the need for different curved band portions for each diameter while maintaining precise fastening
2Strength
If band portions are pressed against the belt with continuous contact, then the fastening strength is improved, but the belt curvature uniformity deteriorates during tightening
Solution Approach 1:
The contact between band portion and belt is segmented into discrete fastening points rather than continuous contact, allowing the belt to maintain uniform curvature while still achieving strong fastening at specific locations through the clearance gap mechanism
3Adaptability or versatility
If the same band portions are used for different belt diameters, then the adaptability is improved, but the fastening precision deteriorates without curvature adaptation
Solution Approach 1:
The clearance gap acts as an intermediary element between the flat band portion and the curved belt, allowing universal band portions to adapt to different diameters while maintaining precise fastening through controlled contact at fastening points
Data Source
AI summary
The tightening device includes a belt (10) having a first and a second end (10A, 10B) and a first and a second tightening lug (14A, 14B) carried by the belt which are formed respectively in a first and a second band portion (12A, 12B) respectively fastened to the outer face of the belt (10) in the vicinity of its first and its second end (10A, 10B). At least the first band portion (12A) is fastened to the belt (10) through at least a first fastening area (18A) formed on a boss (18′A) of the first band portion (12A) protruding inwardly and/or a boss of the belt protruding outwardly.