Hydraulic Operating Device Handlebar Mounting
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Solution Overview
Problem
Existing bicycle hydraulic operating devices are not optimally designed for operability, as they often position the operating member away from the handlebar, leading to reduced ease of use and efficiency in operation.
Innovation Solution
A hydraulic operating device comprising a base member, mounting structure, operating member, and piston, where the operating member is pivotally coupled to the base member and the piston, allowing for closer placement to the handlebar, with a link structure and biasing member to enhance flexibility and force transmission, improving operability and arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operating member is positioned away from the handlebar in existing designs, then the device structure is simpler, but the operability is reduced
Solution Approach 1:
The patent positions the operating member in a different spatial dimension by placing it laterally close to the handlebar rather than distally, utilizing the radial space around the handlebar. This dimensional repositioning improves operability without significantly increasing structural complexity
Solution Approach 2:
The patent introduces a pivot axis as an intermediary element that enables the operating member to be positioned close to the handlebar while still providing the necessary mechanical advantage and force transmission, resolving the conflict between proximity and structural simplicity
2Ease of operation
If the operating member is positioned close to the handlebar, then the operability is improved, but the force transmission to the piston becomes more complex
Solution Approach 1:
The patent employs a pivot axis that allows the operating member to rotate dynamically, converting the lateral positioning advantage into effective force transmission. This dynamic mechanism enables close positioning while maintaining efficient force transfer to the piston through rotational motion
Solution Approach 2:
The pivot axis creates a rotational (circular) path for force transmission, allowing the operating member to move in an arc that efficiently translates lateral motion near the handlebar into linear piston movement, simplifying the overall force transmission geometry
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 allows for improved operability by positioning the operating member closer to the handlebar, enhancing the ease of operation and flexibility of the device, while effectively transmitting operating forces to the piston, thus addressing the inefficiencies of existing designs.
Implementation Method 1
The piston is coupled to the operating member to be pulled in response to a pivotal movement of the operating member from the rest position to the operated position
Data Source
AI summary
A hydraulic operating device for a small vehicle including a bicycle comprises a base member, a mounting structure, an operating member, and a piston. The base member includes a cylinder bore having a cylinder axis. The mounting structure defines a mounting axis linearly extending along the handlebar in a mounting state where the base member is mounted on a handlebar with the mounting structure. The operating member is pivotally coupled to the base member about a first pivot axis between a rest position and an operated position. The cylinder axis is non-perpendicular to the mounting axis as viewed along the first pivot axis in the mounting state. The piston is movably provided in the cylinder bore. The piston is coupled to the operating member to be pulled in response to a pivotal movement of the operating member from the rest position to the operated position.