Smooth-Surface Hose Joint for Soft Silicone Hose Retention
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Solution Overview
Problem
Flexible hoses made of silicone rubber, with lower tearing and tensile strength, are prone to damage and fluid leakage when tightly clamped between barbed protrusions, leading to potential fracture and leakage accidents.
Innovation Solution
A hose joint design featuring a cylindrical nipple with a smooth large-diameter face and an elastic sleeve that pressure-welds the hose, using an annular groove and rib configuration to prevent damage and ensure secure connection without excessive stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the hose is tightly clamped between barbed protrusions on the nipple and peripheral protrusions on the sleeve, then the hose connection strength is improved, but the hose material (silicone rubber) is damaged due to biting and cutting
Solution Approach 1:
The patent introduces a smooth large-diameter cylindrical face on the nipple and a smooth cylindrical inner face on the sleeve as intermediary surfaces between the hose and the clamping structures. These smooth surfaces prevent direct contact and damage between the barbed/peripheral protrusions and the hose material, while still enabling secure connection through friction and distribution of clamping force.
Solution Approach 2:
The patent applies different surface qualities to different regions: the large-diameter cylindrical face and cylindrical inner face have smooth surfaces to prevent damage, while the barbed protrusions and peripheral protrusions maintain their gripping function. This local differentiation allows the hose to be securely held without being cut or damaged by the protrusions.
2Reliability
If barbed-shaped protrusions and peripheral protrusions are used to clamp the hose, then anti-slipping and close contact are achieved, but stress concentration leads to hose fracture in soft materials
Solution Approach 1:
The patent segments the clamping function into two parts: the barbed protrusions and peripheral protrusions provide anti-slipping through distributed contact points, while the smooth large-diameter cylindrical face and cylindrical inner face provide stress distribution. This segmentation allows the hose to resist slipping without experiencing stress concentration that would lead to fracture.
3Stability of the object's composition
If the sleeve is deformed radially to clamp the hose, then secure connection is achieved, but the soft hose material is cut when bent under strong tightening
Solution Approach 1:
The smooth large-diameter cylindrical face on the nipple and smooth cylindrical inner face on the sleeve act as intermediary surfaces that distribute the radial deformation force uniformly across the hose surface. This prevents stress concentration and cutting when the hose is bent under tightening, while still achieving secure connection through the distributed clamping force.
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 design prevents hose fracture and leakage by distributing stress and maintaining a stable connection, enhancing safety and preventing fluid leakage, while ensuring the hose remains securely attached.
Implementation Method 1
an elastic sleeve which is provided so as to clamp the insertion space of the flexible hose between an outer peripheral face of the nipple and the elastic sleeve in a radial direction and is deformable in the radial direction
Implementation Method 2
a tightening member provided outside of the elastic sleeve and having a pressing part which presses the elastic sleeve toward the nipple
Implementation Method 3
the nipple has a large-diameter cylindrical face which is smooth in the axial direction and faces and pressure-welds to an inner surface of the flexible hose in the radial direction
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(d)
AI summary
Even if the flexible hose B is made of a soft material such as silicone rubber, a flexible hose B is prevented from being cut as a result of bending of the flexible hose B, and prevented from coming off over a long time. A hose joint includes a cylindrical nipple provided along an insertion space of the flexible hose, an elastic sleeve which is provided so as to clamp the insertion space of the flexible hose between an outer peripheral face of the nipple and the elastic sleeve in a radial direction and is deformable in the radial direction, and a tightening member provided outside the elastic sleeve and having a pressing part that presses the elastic sleeve toward the nipple, wherein the nipple has a large-diameter cylindrical face which is smooth in the axial direction and faces and pressure-welds to an inner surface of the flexible hose in the radial direction on an axial direction front end of an outer peripheral face, and the elastic sleeve has a cylindrical inner face which is smooth in the axial direction and pressure-welds to an outer surface of the flexible hose on the sleeve inner face facing the large-diameter cylindrical face of the nipple in the radial direction across the flexible hose clamped.