Bicycle Grip Securing Element for Carbon Handlebar Stress
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Solution Overview
Problem
Existing bicycle grips for carbon or fiber composite handlebars face issues with twisting and material damage due to high clamping forces, leading to safety risks and potential weakening of the handlebars, especially when using clamping elements with radial slots.
Innovation Solution
A bicycle grip design featuring a sleeve made of hard plastic surrounded by a softer gripping element, with a clamping element that reduces its diameter using a radial clamping slot, and a securing element made of plastic or fiber composite materials to distribute clamping forces and prevent notch stresses, allowing secure attachment without damaging the handlebar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a clamping element with a radial clamping slot is used to secure the grip to the handlebar, then the grip can be firmly fastened to the handlebar, but the handlebar material may be damaged by high clamping forces and notch stresses
Solution Approach 1:
A securing element is introduced as an intermediary component between the clamping element and the handlebar. This securing element distributes the clamping forces over a larger area and prevents concentration of stresses at single points, thereby avoiding notch stresses and material damage to the carbon handlebar while maintaining firm fastening
Solution Approach 2:
The clamping element is designed with a radial clamping slot that allows controlled deformation and distribution of clamping forces. The slot geometry and material properties are optimized to reduce stress concentration while maintaining adequate fastening strength
2Strength
If long holding horns are used to provide structural support, then the grip can withstand high forces and moments, but the holding horn may twist under load creating safety risks
Solution Approach 1:
The holding horn is constructed from fiber composite materials (such as carbon fiber reinforced plastic) which provide high strength-to-weight ratio and excellent resistance to twisting and deformation under load. The composite structure maintains stability while withstanding high forces and moments
3Strength
If a clamping element with a radial slot is used, then the grip can be securely clamped to the handlebar, but material of the handlebar may be pressed into the clamping slot causing deformation and material weaknesses
Solution Approach 1:
The securing element acts as a mediator between the clamping element and handlebar, preventing direct contact and material deformation. It distributes the clamping pressure evenly, preventing handlebar material from being pressed into the radial slot while maintaining secure clamping
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 ensures safe and reliable mounting of the grip on carbon handlebars, reducing the risk of twisting and material damage, while maintaining secure fastening even under high forces and moments, and eliminating the need for frequent re-tightening.
Implementation Method 1
a securing element (38) arranged inside the clamping element (24) between the inside (44) of the clamping element (24) and the bicycle handlebar (1) in such a way that the clamping force of the clamping element (24) acts on the securing element (38) and from the securing element (38) on the bicycle handlebar (1)
Implementation Method 2
The clamping element (24) has, in particular, a clamping slot (30) that extends over the entire width in a substantially radial direction. Clamping is accomplished by reducing the width of the clamping slot and thus reducing the inside diameter of the clamping member.
Implementation Method 3
The securing element, which is made of plastic in particular, avoids or at least reduces the introduction of notch stresses into the bicycle handlebar
Data Source
Figure 1~4
Figure 5~8
AI summary
A bicycle grip, particularly suitable for mounting on a carbon handlebar, has a sleeve (16) for attaching to the handlebar. The sleeve (16) is surrounded by a gripping element (10). In the mounted state, the handlebar is further surrounded by a clamping element (24). A locking element (38) is arranged within the clamping element between an inner surface (44) of the clamping element (24) and the handlebar. This locking element, which is particularly ring-shaped, is made of plastic, in particular fiber-reinforced plastic, and is freely rotatable within the clamping element (24) to prevent stress concentrations on the carbon handlebar.