Resilient Clamp Device for Folding Bicycle Stem
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Solution Overview
Problem
Conventional folding bicycle connection devices loosen due to vibration and repeated disassembly, leading to a limited service life as the locking agents used to prevent loosening are not indefinitely effective.
Innovation Solution
A clamp device with resilience is designed for a folding bicycle stem, featuring a clamping portion with two resilient steel or iron plates that form a space to securely hold a connection rod, allowing it to rotate by an angle while maintaining the bar shaft in place through a curved bent arm, utilizing polygonal vertices for secure engagement and serrated convolution portions for adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking agent is applied to the connection device to prevent loosening, then the connection device is initially secure, but the locking agent wears off over time due to vibration and repeated disassembly, leading to loosening
Solution Approach 1:
The clamp device automatically adjusts and re-clamps the connection rod through the resilient action of the steel plate when the connection rod is rotated to the next position, without requiring external intervention or replacement of locking agents. The device serves itself by using the rotational movement of the connection rod to trigger the re-clamping action through the resilient plate's elastic deformation and recovery
Solution Approach 2:
The resilient steel plate changes its physical state between deformed and recovered positions, utilizing elastic deformation to create the clamping force. When the connection rod rotates, the steel plate deforms and then recovers, automatically adjusting the clamping force to maintain security without relying on chemical locking agents that wear off over time
2Stability of the object's composition
If the connection device is designed to be fixed and secure, then connection stability is achieved, but the device cannot accommodate the rotational movement of the connection rod when adjusting to different positions
Solution Approach 1:
The clamp device transitions from a static fixed connection to a dynamic adjustable connection. The resilient steel plate allows the connection rod to rotate to different positions while maintaining clamping force through its elastic properties. The device adapts its clamping state dynamically as the connection rod rotates, providing both stability during operation and versatility for position adjustment
Solution Approach 2:
The resilient steel plate acts as an intermediary between the fixed clamp structure and the rotating connection rod. It mediates the conflict between fixed stability and rotational movement by deforming elastically to allow rotation while maintaining continuous clamping force, enabling both connection stability and rotational adjustability
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 clamp device effectively prevents loosening by allowing the connection rod to rotate and re-engage securely, enhancing the service life of the connection device by accommodating vibration and repeated use without the need for frequent relocking.
Implementation Method 1
the first clamping plate and the second clamping plate are each a resilient plate
Data Source
AI summary
A clamp device with resilience can be coupled to a slender bar. The slender bar includes a connection rod and a bar shaft which are connected to each other. The clamp device with resilience includes a clamping portion and a fixing portion. The clamping portion includes two clamping plates for containing the connection rod. The fixing portion is connected to the clamping portion and adapted to fix the bar shaft in place. Rotation of the connection rod causes the two clamping plates to abut against polygonal vertices of the connection rod and therefore move away from each other. Therefore, the connection rod rotates by a fixed angle on each instance.