Swing-Supported Wiper Blade Structure for Chatter Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wiper blades fail to effectively prevent chattering sounds and vibrations due to uneven surfaces and liquid states, as they either become too hard to generate sufficient friction or too soft to maintain effective wiping, leading to reduced vibration damping and wiping performance.
Innovation Solution
A blade attachment tool with a swing shaft and an energizing member that applies a reaction force to the friction force, allowing the blade to swing and maintain a liquid film, thereby reducing vibration and chattering sounds, while adjusting the spring constant to balance wiping efficiency and vibration suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the energizing member is made hard to suppress swing, then vibration damping is improved, but the blade cannot adapt to uneven surfaces and chattering sound increases
Solution Approach 1:
The patent applies the dynamics principle by making the energizing member adjustable in spring constant. The energizing member can be dynamically adjusted between a first state (lower spring constant) and a second state (higher spring constant) based on operating conditions. This allows the system to adapt between vibration suppression (higher stiffness) and chattering prevention (lower stiffness), resolving the contradiction between stability and harmful factors.
2Productivity
If the blade is pressed hard against the abutment surface, then wiping performance is improved, but friction force increases causing excessive swing
Solution Approach 1:
The patent applies parameter changes by adjusting the spring constant of the energizing member based on the pressing force applied to the blade. When higher pressing force is used for better wiping performance, the spring constant is increased to compensate for the increased friction force, preventing excessive swing. This dynamic parameter adjustment resolves the contradiction between productivity and force.
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 provides a stable vibration damping effect and maintains wiping performance by allowing the blade to swing within a controlled rotational moment, effectively suppressing vibrations and chattering sounds across varying surface conditions and liquid states.
Implementation Method 1
an energizing member configured to apply a reaction force to a friction force that causes the second support member to swing about the swing shaft with respect to the first support member
Implementation Method 2
provides a stable vibration damping effect and maintains wiping performance by allowing the blade to swing within a controlled rotational moment, effectively suppressing vibrations and chattering sounds
Implementation Method 3
an energizing member configured to apply a reaction force to a friction force that causes the second support member to swing about the swing shaft
Data Source
AI summary
A blade attachment tool includes a first support member supported by a pressing support portion supporting a blade formed of an elastic member configured to wipe/scrape liquid/solids spreading on an abutment surface by being pressed against the abutment surface and being long in one direction such that the blade is pressed against the abutment surface with a predetermined pressing force, a second support member supported to swing about a swing shaft extending in a longitudinal direction of the blade with respect to the first support member and configured such that a base end side of the blade is attached thereto, and an energizing member configured to apply a reaction force to a friction force that causes the second support member to swing about the swing shaft with respect to the first support member when the blade is pressed against the abutment surface to slide relatively to the abutment surface.