Bicycle Actuation Structure for Pulling to Pushing Force Conversion
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Solution Overview
Problem
Existing bicycle actuation structures fail to efficiently convert pulling forces into pushing forces, leading to inefficiencies in bicycle seatpost assembly operations, particularly in converting the pulling force into a pushing force effectively.
Innovation Solution
A bicycle actuation structure comprising an input member, a coupling member, and an output member, where the output member is pivotally coupled to the coupling member about a second pivot axis opposite to the first pivot axis, allowing effective conversion of pulling forces into pushing forces, with additional features like supporting members and elongated holes to enhance stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional actuation structure is used, then the structure is simple, but the pulling force cannot be effectively converted into pushing force
Solution Approach 1:
The actuation structure is divided into multiple members (input member, coupling member, output member) connected through pivot axes, allowing the pulling force to be converted into pushing force through the segmented mechanical linkage system
Solution Approach 2:
The patent inverts the conventional approach by using a series of pivotally coupled members that convert pulling motion into pushing motion, rather than directly transmitting the pulling force
2Productivity
If the output member is offset from the reference axis, then the structure provides movement, but the force conversion efficiency is reduced
Solution Approach 1:
The patent employs asymmetric positioning of pivot axes (first pivot axis and second pivot axis are different) to achieve effective force conversion while maintaining smooth operation through the asymmetric mechanical advantage provided by the different pivot locations
3Stability of the object's composition
If supporting members and guiding parts are added, then the movement stability is improved, but the device complexity increases
Solution Approach 1:
The supporting member acts as an intermediary element that provides stability to the actuation structure through the guiding part, mediating between the moving members and the frame without significantly increasing overall complexity
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 enables efficient conversion of pulling forces into pushing forces, improving the operational efficiency of bicycle seatpost assemblies by stabilizing movements and reducing interference, resulting in a more effective force transmission and enhanced bicycle performance.
Implementation Method 1
The coupling member is pivotally coupled to the input member about a first pivot axis
Implementation Method 2
The output member is pivotally coupled to the coupling member about a second pivot axis to move in a second direction opposite to the first direction
Implementation Method 3
The output member includes a transmitting part to transmit a movement of the output member in the second direction to a receiving member
Data Source
AI summary
A bicycle actuation structure comprises an input member, a coupling member, and an output member. The input member is configured to receive a pulling force to move in a first direction. The coupling member is pivotally coupled to the input member about a first pivot axis. The output member is pivotally coupled to the coupling member about a second pivot axis to move in a second direction opposite to the first direction in response to a movement of the input member in the first direction, the second pivot axis being different from the first pivot axis.