Wiper Bracket Sub-Bracket Spring Preload Windshield Fit
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Solution Overview
Problem
Existing wiper designs face challenges in fitting various windshield sizes due to high manufacturing costs and curvature deformation issues, particularly with metal components and prefabricated spring steel wipers.
Innovation Solution
A wiper bracket system featuring a main bracket with arc-shaped guiding surfaces and pivotally connected sub-brackets, utilizing a spring for downwardly curved preload and made of plastic materials, allowing for adaptable fitting to different windshield sizes without the need for complex joint precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If metal main bracket and sub-brackets with multiple pivot joints are used to fit large windshields, then the wiper strip can adapt to different windshield sizes, but the manufacturing precision requirement and manufacturing cost increase significantly
Solution Approach 1:
The wiper bracket is divided into a main bracket and multiple sub-brackets that can be selectively assembled. Each sub-bracket is a separate component that can be attached to the main bracket through simple connection structures, allowing the system to be segmented and reconfigured for different windshield sizes without requiring high-precision complex joints.
Solution Approach 2:
The main bracket is designed with universal connection structures that can accommodate different types and numbers of sub-brackets. The connection structure between main bracket and sub-brackets uses a standardized design that simplifies manufacturing while maintaining adaptability across different configurations.
2Device complexity
If prefabricated spring steel is used to replace main bracket and sub-brackets, then the structure is simplified and fit to windshield is improved, but curvature deformation occurs after extended usage and material cost increases
Solution Approach 1:
The connection structure incorporates an arc-shaped guiding surface that provides a curved path for the sub-bracket relative to the main bracket. This curvature design allows the sub-bracket to pivot smoothly while maintaining proper alignment and preventing deformation of the bracket components over time.
Solution Approach 2:
The spring element in the connection structure is designed with specific elastic parameters that allow it to maintain constant downward pressure on the sub-bracket. This controlled parameter change in the spring's compression state ensures the sub-bracket remains firmly positioned without deforming the bracket structure, providing reliable long-term performance.
3Manufacturing precision
If arc-shaped guiding surface with spring preload is used in the connection structure, then the sub-bracket fit to windshield is improved and curvature deformation is reduced, but the connection structure complexity increases
Solution Approach 1:
The connection structure merges multiple functions into a single integrated design: the arc-shaped guiding surface provides both the pivot path and the alignment guidance, while the spring element simultaneously provides downward pressure and compensates for wear. This merging of functions achieves precise fit without requiring multiple separate adjustment mechanisms.
Solution Approach 2:
The spring element automatically maintains constant downward pressure on the sub-bracket as it pivots along the arc-shaped guiding surface. This self-adjusting mechanism ensures the wiper strip remains firmly positioned against the windshield throughout its range of motion without requiring external adjustment or complex control systems.
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 cost-effective and durable wiper system that maintains a precise fit to the windshield, reducing manufacturing costs and minimizing curvature deformation, while accommodating various windshield sizes through adjustable sub-bracket configurations.
Implementation Method 1
the spring is in a compressed state, while the compression resilience of the spring applies a downwardly curved preload to the first sub-bracket along the arc-shaped guiding surface formed between the main bracket and the first sub-bracket
Data Source
AI summary
The invention discloses a wiper bracket and a wiper. The wiper bracket comprises a main bracket, at least one first sub-bracket and a connecting device. The connecting device contains a baffle located at the bottom of the first sub-bracket and the main bracket, with one end fixed at the main bracket or the first sub-bracket, and the other end being a free end. The free end is located on the bracket opposite to the fixed end of the baffle. A side of the first sub-bracket is pivotally connected to the main bracket by a pivotal shaft. A spring is disposed between the main bracket and the first sub-bracket, and located at an upper portion of the baffle. The compression resilience of the spring applies downwardly curved preload to the first sub-bracket.