Bicycle Toe Positioning Device Rib Wing Clamping
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Solution Overview
Problem
Existing bicycle toe positioning devices with elastic units can lead to accidents due to separation from the treadle during operation, and increasing clamping force through screws can cause spring fatigue, affecting user concentration and safety.
Innovation Solution
A bicycle toe positioning device using a rib and two wings to securely fix the treadle, combined with a twisting spring elastic unit, provides a firm structure and adjustable clamping mechanism to prevent separation and reduce elastic unit fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamping force is increased through screw adjustment to prevent toe positioning device separation, then the reliability of the connection is improved, but the elastic unit undergoes excessive deformation and fatigue which reduces its lifespan and may cause failure
Solution Approach 1:
The patent introduces a rib portion and pair of wings structure that changes the geometric parameters of the clamping interface. The rib portion fits into a corresponding groove while the wings engage with lateral surfaces, creating a multi-point contact system that distributes clamping forces more evenly across the elastic unit, reducing localized stress and deformation
Solution Approach 2:
The clamping interface is segmented into multiple functional elements: the rib portion providing primary positioning, the wings providing lateral constraint, and the elastic unit providing clamping force. This segmentation allows each element to perform its specific function optimally without overloading any single component
2Device complexity
If only elastic units with screw adjusters are used to clamp the toe positioning device, then the device complexity is kept relatively simple, but the stability of the connection is insufficient leading to separation during operation
Solution Approach 1:
The rib portion and wings create an asymmetric clamping interface where the rib fits into a corresponding asymmetric groove pattern. This asymmetric design provides directional stability, preventing rotation and separation of the toe positioning device while maintaining a simple overall structure
Solution Approach 2:
The patent merges the positioning and clamping functions into a single integrated structure. The rib portion and wings work together with the elastic unit to simultaneously provide positional constraint and clamping force, eliminating the need for separate positioning and clamping mechanisms
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
The solution enhances safety and ease of operation by maintaining a secure connection between the toe positioning device and treadle, reducing the risk of accidents and prolonging the lifespan of the elastic unit through reduced tight force.
Implementation Method 1
an elastic unit enclosing around the pivotal rod; the elastic unit being a twisting spring
Implementation Method 2
the elastic unit being a twisting spring; one end of the elastic unit resisting against a resisting edge of the treadle and another end thereof resists against the buckling block
Data Source
AI summary
A bicycle toe positioning device comprises a treadle having a main body which is formed with an axial hole, an axial rod and a bearing set. The treadle is further formed with a first clamping portion and a second clamping portion. A tightening unit has a first positioning end and a second positioning end. In assembly, the first clamping portion is buckled to a rib and a pair of wings of the first positioning end. The second clamping portion is secured to the second positioning end so that the treadle is secured to the toe positioning unit. The first clamping portion has a buckling block which is fixed to the treadle by using an pivotal rod. A spring is retained in the first clamping portion and an adjust unit serves to adjust the tightness of the buckling block.