Bicycle Pedal Detection Device Spindle Integration
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Solution Overview
Problem
Existing pedal detection devices for bicycles are often externally mounted, making them susceptible to damage and aesthetically unpleasing, while also lacking the ability to detect pedal activity with high precision and speed.
Innovation Solution
A pedal detection device is integrated into the spindle of a crankset, featuring an electronics module with sensors for angular velocity and position detection, secured by an expander wedge that expands radially to lock into the spindle, allowing for secure and compact installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pedal detection devices are externally mounted on the crank, crank arm, or frame, then installation is simple and device structure is straightforward, but the devices are susceptible to damage and aesthetically unpleasing
Solution Approach 1:
The pedal detection device is nested within the spindle structure of the crankset. The electronics module is disposed inside the spindle, and the expander wedge is received within the electronics module, creating a compact integrated assembly that is both protected and aesthetically pleasing while maintaining ease of installation as a complete unit
Solution Approach 2:
The patent merges the pedal detection device with the spindle structure by integrating the electronics module and expander wedge into the existing spindle. This combination eliminates the need for separate external mounting while providing protection and improving appearance
2Device complexity
If pedal detection devices are externally mounted, then device structure is simple, but measurement precision and detection speed are insufficient
Solution Approach 1:
The patent replaces traditional mechanical external mounting with an expander wedge mechanism that uses radial expansion to secure the electronics module. This mechanical substitution provides more precise positioning and faster detection response while maintaining structural simplicity
Solution Approach 2:
The expander wedge is designed to be movable relative to the electronics module, allowing it to expand radially to engage with the spindle interior surface. This dynamic mechanism enables quick installation and removal while ensuring precise positioning during operation
3Strength
If an expander wedge is used to secure the electronics module to the spindle, then the device becomes robust and secure, but the device complexity increases
Solution Approach 1:
The expander wedge is designed with a specific geometry where its lateral surfaces engage with corresponding surfaces of the electronics module. This localized geometric interaction provides robust securing through friction and mechanical engagement without requiring complex fastening mechanisms or multiple components
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
This solution provides a robust, aesthetically pleasing, and highly accurate means of detecting pedal activity, enabling near-instantaneous data transmission for improved rider performance and suspension control.
Implementation Method 1
Axial movement of the expander wedge relative to the electronics module causes the expander wedge to expand radially
Data Source
AI summary
Example pedal detection devices for bicycles are described herein. An example a pedal detection device includes an electronics module to be disposed in a spindle of a crankset of the bicycle. The electronics module includes a sensor to detect angular velocity and/or position of the spindle, a driver, and an expander wedge movably coupled to the electronics module via the driver. Axial movement of the expander wedge relative to the electronics module causes the expander wedge to expand radially.