Piston Damper Sliding Structure for Vibration and Noise Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing damping solutions, such as the annular seal disclosed in Patent Literature 1, have limited damping performance due to a small contact area with the shaft member, which results in inadequate absorption of kinetic energy and subsequent vibration resonance leading to unpleasant noise in vehicles.
Innovation Solution
A damper is designed with a piston and a sliding member that includes a protruding portion and an extending portion to increase the contact area with the piston, enhancing damping performance by allowing the sliding member to effectively absorb kinetic energy as the piston advances and retreats, thereby suppressing vibrations between two members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a seal with a lip portion is used to contact the shaft member, then the structure is simple, but the damping performance is insufficient due to small contact area
Solution Approach 1:
The sliding member is divided into multiple functional parts: a piston for linear movement, a sliding member with protruding portions for radial contact, and an extending portion for structural connection. This segmentation allows each part to perform its specific function optimally while collectively achieving high damping performance through increased contact area between the protruding portions and piston outer peripheral surface
Solution Approach 2:
The invention transitions from a single-point or line contact (lip portion) to a multi-dimensional contact system. The protruding portions extend radially inward to contact the piston's outer peripheral surface, creating a two-dimensional contact area. The extending portion then connects these radial protrusions to the outer tubular portion, adding a third dimensional aspect to the contact and support structure, thereby significantly increasing the effective damping contact area
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 improved damper achieves enhanced damping performance by increasing the contact area with the piston, effectively reducing vibrations and noise in vehicles by absorbing kinetic energy through the sliding and protruding mechanisms.
Implementation Method 1
The sliding member includes a protruding portion protruding inward in a radial direction inside the tubular portion and configured to come into contact with an outer peripheral surface of the piston
Data Source
AI summary
A damper includes: a piston configured to advance and retreat by receiving a force from another of a first member and a second member; a sliding member configured to slide on the piston as the piston advances and retreats; and a support member having a tubular portion and an insertion hole formed inside the tubular portion. The piston is inserted through the insertion hole. The sliding member includes a protruding portion protruding inward in a radial direction inside the tubular portion and configured to come into contact with an outer peripheral surface of the piston, an outer tubular portion disposed outside the tubular portion, and an extending portion extending inward in the radial direction from one end of the outer tubular portion and indirectly or directly coupling the protruding portion and the outer tubular portion.