Bicycle Cable Assembly with Interlocking Metal Sleeve Protection
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Solution Overview
Problem
Conventional bicycle cable assemblies face issues with the plastic cover losing elasticity and durability due to exposure, inability to adjust length, and susceptibility to damage, which can lead to the inner cable being exposed and damaged.
Innovation Solution
A bicycle cable assembly featuring a series of interconnected metallic hollow sleeves with a hook and engaging edge design, allowing for adjustable length and secure assembly to protect the inner cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic cover is used to protect the inner cable, then the cable is protected from water erosion, but the plastic cover loses elasticity and durability due to oxidation and temperature variation
Solution Approach 1:
The external protection tube is divided into multiple detachable sleeves that can be engaged together. Each sleeve is a separate segment that can be independently replaced or adjusted, solving the problem of overall cover degradation by allowing selective replacement of only the worn segments.
Solution Approach 2:
The material of the external protection tube is changed from plastic to metal (such as stainless steel), fundamentally altering the material parameters to resist oxidation and temperature variation. This material parameter change eliminates the degradation issues inherent in plastic covers.
2Reliability
If a plastic cover is used to protect the inner cable, then the cable is protected from water erosion, but the plastic cover is susceptible to cutting and damage
Solution Approach 1:
The material parameter is changed from plastic to metal, fundamentally improving the strength and resistance to cutting and scratching. Metal material parameters provide superior mechanical strength and damage resistance compared to plastic.
Solution Approach 2:
The protection system uses a composite structure with an inner plastic waterproof cover and an outer metal protective sleeve. This composite material approach combines the waterproofing properties of plastic with the strength and damage resistance of metal.
3Device complexity
If a fixed-length plastic tube is used, then the cable assembly is simple, but the length cannot be adjusted according to special positions
Solution Approach 1:
The protection tube is segmented into multiple detachable sleeves of standardized lengths. These segments can be combined in different quantities and configurations to achieve various total lengths, providing adaptability while maintaining relatively simple individual component structures.
Solution Approach 2:
The protection tube system transitions from a fixed static structure to a dynamic configurable structure. The number and arrangement of sleeves can be adjusted based on specific application requirements, enabling length adaptation without complex mechanisms.
4Device complexity
If the plastic cover is exposed to the outside, then the cable assembly is simple, but the inner cable tends to be exposed and damaged
Solution Approach 1:
The protection structure uses a nested configuration where the inner plastic waterproof cover is placed inside the outer metal protective sleeve. This nested arrangement provides layered protection for the cable, with each layer addressing different protection needs, while maintaining a compact and relatively simple overall structure.
Data Source
AI summary
A bicycle cable assembly mainly includes an external protection tube composed of several hollow sleeves hooking together. Hooks and engaging edges of the sleeves hook together so that the external protection tube is formed and can be properly adjusted according to a length of a cable and a special position by increasing or decreasing the number of sleeves. Also, the hook hooking the engaging edge can prevent the external protection tube from being arbitrarily disassembled by others. Also, it is possible to effectively prevent an inner protection tube from exposing to the outside and thus being damaged. Thus, a protection layer can be indirectly added to the bicycle cable assembly.