Bicycle Stem Locking Mechanism for Simple Assembly
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Solution Overview
Problem
The existing bicycle stem assembly is complicated to disassemble and reassemble, has too many parts that are difficult to store and can be easily lost, and lacks an aesthetic design due to exposed locking surfaces and components.
Innovation Solution
A stem design featuring a locking device with a clamping part, sliding blocks, and a fixing member that secures the steering tube within a perforation, reducing the number of parts and hiding the locking mechanism at the bottom, making assembly and disassembly simple, and enhancing aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional fixing members and locking surfaces are used to secure the steering tube, then the connection strength is sufficient, but the assembly and disassembly procedures become complicated and difficult to operate
Solution Approach 1:
The locking device employs a movable clamping part that can dynamically transition between locked and unlocked states. The clamping part is designed to move along the steering tube, allowing quick engagement and disengagement without complex assembly procedures, while maintaining strong connection when locked
Solution Approach 2:
The locking device features self-locking capability where the clamping part automatically secures to the steering tube through its mechanical design. The structure enables self-retention without requiring additional locking mechanisms or complex procedures, simplifying operation while ensuring secure connection
2Reliability
If multiple fixing members and components are used to secure the steering tube, then the connection reliability is improved, but the number of parts increases making them difficult to store and easy to lose
Solution Approach 1:
Multiple fixing functions are merged into a single integrated locking device. The clamping part, sliding blocks, and fixing member work as one unified mechanism, eliminating the need for separate fixing components and reducing the total number of parts while maintaining connection reliability
Solution Approach 2:
The locking device serves multiple functions simultaneously: it secures the steering tube, provides positioning, and enables quick release. This multi-functional design replaces what would traditionally require multiple separate components, reducing part count while enhancing reliability
3Device complexity
If the locking surface, hole opening, and fixing member head are positioned at the top of the stem, then the assembly structure is simplified, but the aesthetic feeling is compromised due to exposed components
Solution Approach 1:
The locking device components are repositioned from the top surface to the bottom surface of the stem. This dimensional relocation hides the mechanical components from view when the bicycle is in normal use, improving aesthetics while maintaining the simplicity of the assembly structure internally
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 simplifies the assembly and disassembly process, reduces part loss, and improves the aesthetic appeal by concealing the locking mechanism, while allowing easy fixing of accessories without additional components.
Implementation Method 1
when the first fixing member moves toward the inside of the perforation, the first fixing member drives the sliding blocks to approach each other and squeeze the clamping part, such that the clamping part moves in a direction toward the first aperture
Data Source
AI summary
A stem includes a stem body, a column and a locking device. The stem body is provided with a perforation. The column is disposed at one end of the stem body and provided with a first aperture, the perforation is in communication with the first aperture. The locking device is disposed in the perforation and includes a clamping part, two sliding blocks and a first fixing member, the clamping part is located between the sliding blocks, and the first fixing member penetrates the clamping part and the sliding blocks. When the first fixing member moves toward the inside of the perforation, the first fixing member drives the sliding blocks to approach each other and squeeze the clamping part, such that the clamping part moves in a direction toward the first aperture. According to this, the assembly and disassembly procedures of the present invention are quite simple and easy to operate.