Telescopic Fork Equalizing Volume Integration
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Solution Overview
Problem
Existing telescopic suspension fork legs for motorcycles face challenges in compact design and component count, leading to increased installation space and seat height due to separate equalizing volumes, which affect comfort and center of gravity.
Innovation Solution
A telescopic suspension fork leg with a concentrically arranged equalizing volume between the damping tube and a separating piston, eliminating the need for additional installation space and maintaining a compact design by integrating the equalizing volume within the annular space chamber, and utilizing a differential piston surface to manage pressure and fluid flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate equalizing volume is provided outside the telescopic suspension fork leg, then the damping fluid can be equalized, but the axial installation space increases and seat height increases
Solution Approach 1:
The patent merges the equalizing volume with the annular space chamber by providing a first communication connection between them. This allows the damping fluid to be equalized without requiring a separate external equalizing volume, thereby reducing axial installation space while maintaining the necessary fluid equalization function.
Solution Approach 2:
The annular space chamber serves multiple functions: it acts as both a damping fluid passage and an equalizing volume. By making the damping fluid in the annular space chamber communicative with both the damping tube and the equalizing volume, the system achieves multi-functionality that eliminates the need for separate components.
2Length of moving object
If the equalizing volume is integrated within the annular space chamber, then axial installation space is reduced, but the damping fluid must remain under system pressure to prevent gas bubble formation
Solution Approach 1:
The patent ensures continuous pressure maintenance in the damping fluid by providing communication paths that allow the damping fluid to remain under system pressure throughout operation. The first communication connection between the annular space chamber and equalizing volume, along with the second communication connection to the damping tube, ensures continuous pressure equalization that prevents gas bubble formation.
3Productivity
If damping fluid flows through bores and valves at high speeds, then damping function is achieved, but gas bubbles form and cavitation occurs
Solution Approach 1:
The patent introduces an intermediary equalizing volume that acts as a buffer between the high-speed flow regions and the damping fluid reservoir. This equalizing volume allows the damping fluid to be supplied at controlled pressures, preventing the formation of gas bubbles and cavitation while still enabling effective damping through the valve arrangements.
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 configuration reduces axial installation space, maintains a compact design, and prevents the formation of gas bubbles by ensuring the damping fluid remains under system pressure, enhancing the fork's damping performance and reducing the risk of cavitation.
Implementation Method 1
a compressible equalizing volume 23 for a damping fluid volume which is displaced by the piston rod 13
Implementation Method 2
the damping fluid is placed under high pressure, so that the formation even of gas bubbles can not occur
Data Source
AI summary
A telescopic suspension fork leg, such as may be using in conjunction with a motorcycle. The fork leg has an inner tube and an outer tube, a damping arrangement, and a spring arrangement which is arranged inside a first chamber formed in the outer tube and resting opposite a second chamber formed by the damping arrangement and arranged beneath the first chamber. The telescopic suspension fork leg features a compressible equalizing volume for a damping fluid volume displaced by a piston rod. The equalizing volume is provided generally concentrically between a damping tube and a separating piston. The separating piston fluidically separates the equalizing volume from an annular space chamber.