Electric Bicycle Chain Guard Attachment Device
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Solution Overview
Problem
Conventional chain guard attachment devices for electric bicycles face difficulties in accommodating electric motors with interfering geometries and varying installation angles, making optimal attachment challenging.
Innovation Solution
A two-part device design allows for adjustable attachment by enabling relative rotation and positioning of parts around the motor's axis, with features like elongated holes, receptacles, and angle scales to accommodate different motor geometries and angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-part attachment device is used, then the device structure is simple, but it cannot adapt to different motor geometries and installation angles
Solution Approach 1:
The attachment device is divided into two separate parts: a first part that attaches to the motor housing and a second part that attaches to the chain guard. These parts can be connected in multiple relative positions and orientations, allowing the device to adapt to different motor geometries and installation angles while maintaining a relatively simple overall structure.
Solution Approach 2:
The device enables dynamic adjustment of the relative position and orientation between the two parts through rotatability and translatability mechanisms. This allows the parts to be positioned in multiple configurations to accommodate varying motor geometries and installation angles, providing adaptability without requiring a completely complex fixed structure.
2Adaptability or versatility
If the device is made rotatable and adjustable to accommodate different angles, then adaptability improves, but the device complexity increases
Solution Approach 1:
By segmenting the device into two separate parts with dedicated connection features, the patent achieves adjustability through a manageable number of connection mechanisms rather than a single complex adjustable component. Each part has specific features (elongated holes, receptacles, angle scales) that work together to provide rotational and positional adjustment.
Solution Approach 2:
The device provides adjustment capabilities by changing positional parameters (rotation angles and translation distances) through standardized connection features. The elongated holes and receptacles allow for discrete angular and positional adjustments, while the angle scale provides a reference system for setting the desired orientation, achieving adaptability through parameter variation rather than complex mechanical structures.
Data Source
Figure 1~2
Figure 3~7
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AI summary
Device (2) for attaching a chain guard (1) to an electric bicycle, comprising means for fastening the chain guard (1) to the device (2), means for attaching the device (2) to the electric bicycle, and a first and a second part (6, 7) which are designed to be connected to one another and fixed to one another in at least one first relative position and in at least one second relative position different from the first, wherein the device (2) is designed to be attached to the electric bicycle in a fixed manner to one another when the two parts (6, 7) are connected to one another and/or fixed to one another.