Electric Bicycle Derailleur Wireless Unit Link Member Placement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric bicycle derailleurs with wireless units face challenges in compactness and interference with bicycle chains and sprockets, and require effective wireless communication while maintaining a compact design.
Innovation Solution
The electric bicycle derailleur incorporates a wireless unit disposed on link members, with a motor unit positioned on the base member or movable member, and an electric conductor connecting the wireless unit and motor unit, using radio wave transparent materials to enhance wireless communication and avoid interference with the chain and sprockets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless unit is integrated into the derailleur, then wireless communication functionality is achieved, but the device size increases and compactness is reduced
Solution Approach 1:
The wireless unit is merged with the derailleur body to form an integrated assembly. The wireless unit includes a wireless receiver and is disposed on the link member, combining communication functionality with the mechanical derailleur structure to achieve both wireless operation and compact form factor
Solution Approach 2:
The wireless unit is nested within the derailleur structure by disposing it on the link member. This nesting approach allows the wireless components to be housed within the existing derailleur volume rather than adding external bulk, maintaining compactness while enabling wireless communication
2Volume of moving object
If the wireless unit is positioned closer to the chain and sprockets, then the derailleur remains compact, but interference with the chain and sprockets increases
Solution Approach 1:
The wireless unit is positioned on the link member at a specific location that provides different spatial relationships with various components. This local positioning allows the wireless unit to be close enough to maintain compactness while being oriented or placed to avoid direct interference with the chain and sprocket engagement areas
3Reliability
If the wireless unit is positioned higher to avoid ground contact, then the risk of hitting the ground is reduced, but the device height increases
Solution Approach 1:
The wireless unit is disposed on the link member, utilizing the lateral dimension of the derailleur mechanism. By positioning the wireless unit on the link member rather than extending it vertically, the design achieves adequate clearance from the ground through the natural movement arc of the link member without increasing the overall height of the derailleur assembly
Data Source
AI summary
An electrical bicycle derailleur is basically provided with a base member, a movable member, at least one link member, a motor unit and a wireless unit. The base member is configured to be mounted to a bicycle frame. The movable member is movably arranged relative to the base member. The at least one link member movably connects the base member and the movable member. The motor unit is disposed on one of the base member, the movable member, and the at least one link member. The motor unit includes a motor configured to move the at least one link member. The wireless unit includes a wireless receiver configured to receive a wireless signal, the wireless unit being disposed on the at least one link member.