Wiper Arm Shock-Absorbing Connection Design
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Solution Overview
Problem
Existing windshield wiper arms experience the 'slip-stick' effect, leading to rattling and abrupt movement under varying operating conditions, which existing electronic methods fail to address effectively due to complexity and high costs.
Innovation Solution
A shock-absorbing connection between the joint and extension parts, where the joint encloses the extension like a clamp, creating an open area and using an elastic plastic sleeve or mat for damping, is implemented to absorb shocks and stabilize the wiper arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid connection is used between the joint part and extension, then structural stability is improved, but chattering and slip-stick effect occur under varying loads
Solution Approach 1:
The patent applies beforehand cushioning by introducing a shock-absorbing connection element between the joint part and extension. This element is specifically designed to cushion and absorb shocks and vibrations that occur during wiper operation, preventing the slip-stick effect and chattering before they can disrupt smooth operation. The connection element acts as a pre-positioned buffer that mitigates the harmful effects of varying loads on the rigid structural components.
2Reliability
If electronic methods are used to counteract the slip-stick effect, then operational smoothness is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies mechanics substitution by replacing the electronic control system with a purely mechanical shock-absorbing connection element. Instead of using sensors, actuators, and control algorithms to detect and counteract the slip-stick effect, the invention uses a mechanically passive connection element that automatically absorbs shocks and vibrations through its inherent elastic properties. This substitution eliminates the need for complex electronic systems while achieving the same goal of smooth operation.
3Reliability
If a complex shock-absorbing mechanism is used, then damping behavior is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent applies flexible shells and thin films by using an elastic connection element that functions as a flexible component between the rigid joint part and extension. This elastic element, which can be a rubber bushing, polymer component, or flexible connector, provides shock absorption and damping through its inherent elasticity without requiring complex internal mechanisms. The simple flexible component design allows for easy manufacturing through common processes like injection molding or rubber bonding, maintaining manufacturing simplicity while achieving excellent damping behavior.
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 solution effectively prevents chattering and ensures an optimal wiping pattern while being simple and cost-effective, enhancing stability and damping behavior.
Implementation Method 1
A shock-absorbing connection (22) made of an elastic plastic is provided between the extension (18) and the joint part (12)
Data Source
Figure 1~4
AI summary
The wiper arm (10) has an articulated section (12) which is fastened with an extension rod (18) having a free end attached with a fastening unit (20) such as bent sheet metal. The fastening unit fastens the wiper blade and a shock-absorbing connection (22) is formed between articulated section and the extension rod.