Window Washer Brushing Arm Motion Conversion Mechanism
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Solution Overview
Problem
Existing vehicle window washers with wiping arms fail to satisfactorily remove stuck dirt due to their slow and limited range of motion, which is insufficient for effective dirt removal.
Innovation Solution
A window washer apparatus featuring a brushing arm mounted to a wiping arm with a motion conversion mechanism that converts back-and-forth rotational motion into both rotational and linear motion, allowing the brushing arm to effectively brush the window by utilizing a first wheel pressed on the window, a crankshaft, and a second wheel connected via a gear to provide multiple linear back-and-forth motions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional wiping element is used with slow and long range motions, then the window surface can be covered, but stuck dirt cannot be effectively removed
Solution Approach 1:
The patent applies dynamics by converting the single rotational motion of the wiping arm into multiple linear back-and-forth motions of the brushing arm through a motion conversion mechanism. This creates swift, dynamic brushing actions that effectively remove stuck dirt, transforming the static slow wiping motion into dynamic high-speed brushing strokes.
Solution Approach 2:
The patent segments the motion function by separating the wiping arm's rotational motion from the brushing arm's linear motion through a motion conversion mechanism. This segmentation allows the brushing arm to perform independent swift back-and-forth motions while the wiping arm maintains its rotational coverage function.
2Productivity
If a single rotational motion is used to drive the wiping arm, then the structure is simple, but the brushing arm cannot achieve multiple linear back and forth motions needed for effective dirt removal
Solution Approach 1:
The patent uses an intermediary motion conversion mechanism that includes a first wheel pressed on the window, a crankshaft, and a second wheel connected via gear. This intermediary system translates the single rotational motion of the wiping arm into multiple linear back-and-forth motions of the brushing arm, enabling effective dirt removal while maintaining a manageable structural complexity.
3Area of stationary object
If the wiping arm rotates slowly with long range motion, then it can cover the entire window, but it cannot provide the swift motions required for dirt removal
Solution Approach 1:
The patent segments the functions of coverage and cleaning by separating the wiping arm's rotational coverage motion from the brushing arm's linear cleaning motion. The wiping arm maintains slow rotational motion for comprehensive window coverage, while the brushing arm performs swift back-and-forth motions through the motion conversion mechanism for effective dirt removal.
Solution Approach 2:
The motion conversion mechanism introduces dynamics by converting the slow rotational motion into swift linear oscillations of the brushing arm. This dynamic transformation allows the system to simultaneously achieve broad coverage through the wiping arm and high-speed cleaning through the brushing arm.
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 removal of stuck dirt from vehicle windows by converting a single rotational motion of the wiping arm into multiple linear back-and-forth motions of the brushing arm, providing a more effective brushing action than traditional window washers.
Implementation Method 1
The first wheel may include a spring element, for pressing the first wheel on the window.
Implementation Method 2
a first wheel, being pressed on the window, for being rotated by the window
Implementation Method 3
a crankshaft, for converting the rotation of the first wheel to linear motion of the brushing arm
Implementation Method 4
The first wheel may include a rubber surrounding, for rolling thereon on the window.
Data Source
AI summary
A window washer having a brushing arm mounted to a wiping arm of the window washer, and a motion conversion mechanism for converting back and forth rotational motion of the wiping arm to back and forth linear motion of the brushing arm, thereby the brushing arm rotates with the wiping arm motion, and in addition, linearly slides back and forth from the wiping arm, for brushing a window.