Bicycle Frame Hidden Battery Pack via Rotating Insertion
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Solution Overview
Problem
Conventional electric bicycle battery assembly designs compromise the aesthetic appeal, structural rigidity, durability, and safety due to exposed batteries, which alter the center of gravity and provide poor fastening reliability, and existing solutions either require custom frame designs or large recesses that diminish the bicycle's integrity.
Innovation Solution
A bicycle frame with a hollow tube member featuring a receiving space and a small-sized replacement opening that allows multiple batteries to rotate and swing through, keeping the opening size minimal and preserving the frame's integrity while protecting the battery from damage and moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery is axially inserted into the tube member through a large opening, then the battery can be easily installed, but the opening diminishes the rigidity, durability, and safety of the bicycle frame structure
Solution Approach 1:
The battery installation process is segmented into two stages: first, the battery is inserted through a small access opening; second, the battery is rotated 90 degrees to a horizontal position within the receiving space. This segmentation allows the opening to be small (maintaining frame strength) while still enabling battery installation through a multi-step process.
Solution Approach 2:
The battery is designed with rotational capability, allowing it to change orientation from vertical (during insertion) to horizontal (final position). This dynamic movement enables the battery to pass through a small opening by changing its orientation, eliminating the need for a large opening that would compromise frame strength.
2Ease of operation
If an elongated recess is formed in the peripheral surface of the tube member for receiving the battery, then the battery can be easily inserted, but the aesthetic appeal is ruined and the rigidity of the bicycle frame structure is severely diminished
Solution Approach 1:
The battery insertion function is extracted from the peripheral surface of the tube member. Instead of forming an elongated recess in the visible peripheral surface, a separate small access opening is created, allowing the battery to be inserted without compromising the aesthetic appearance of the frame's outer surface.
Solution Approach 2:
A small access opening serves as an intermediary element that enables battery insertion without requiring a large visible recess. This intermediate structure allows the battery to be installed while maintaining the aesthetic integrity of the frame's peripheral surface.
3Ease of operation
If an elongated recess is formed in the tube member for receiving the battery, then the battery can be directly inserted, but the fastening reliability of the battery is poor
Solution Approach 1:
The battery securing process is segmented into insertion and securing stages. The battery is first inserted through the small opening, then a separate securing mechanism (such as a snap-fit or locking feature) engages to firmly hold the battery in its horizontal position, ensuring reliable fastening without requiring a large opening.
4Ease of manufacture
If the battery is assembled on a luggage carrier or supporting rack, then the battery can be easily attached, but the aesthetic appeal is diminished and the center of gravity is altered causing negative influences on riding stability
Solution Approach 1:
The battery assembly is merged with the bicycle frame structure itself. The receiving space is formed inside the tube member of the frame, integrating the battery housing into the frame rather than using a separate luggage carrier or supporting rack. This integration maintains the original center of gravity and riding stability while providing easy battery installation.
Data Source
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AI summary
The invention relates to a bicycle frame with a hidden battery pack has a tube member and a battery pack (20). The tube member is hollow and has a peripheral surface, a receiving space (111), and a replacement opening (112). The receiving space (111) is formed inside the tube member. The replacement opening (112) is defined in the peripheral surface of the tube member and communicates with the receiving space (111). The battery pack (20) is mounted in the receiving space (111) and has multiple batteries (21). Each two adjacent batteries (21) of the multiple batteries (21) are connected to each other and are able to rotate relative to each other. Each battery (21) of the multiple batteries (21) is capable of being rotated or swung to pass through the replacement opening (112).