Wiper Linkage System Direct Motor Transmission

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Solution Overview

Problem

Conventional wiper linkage systems are costly and complex due to multiple pivot housings, link units, and pivot shafts, which increase weight and complicate the assembly process.

Innovation Solution

A wiper linkage system that directly transmits the rotating forces of a motor to a wiper arm through a simplified structure, eliminating the need for a pivot housing, link unit, and pivot shaft, using a gear housing, pipe rod, crank arm, and link structure to operate two wiper arms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional wiper linkage systems use multiple pivot housings, link units, and pivot shafts, then the wiper arms can be operated, but the cost and device complexity increase

Engineering Contradiction:

Improvewiper arm operationVSAvoidlinkage system structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines multiple separate components (pivot housing, link unit, pivot shaft) into a single integrated linkage mechanism. The motor shaft directly drives the wiper arm through a simplified linkage that merges the functions of multiple components into one unified structure, reducing overall system complexity while maintaining operational capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The simplified linkage mechanism performs multiple functions simultaneously: it transmits motor rotation, provides the necessary mechanical linkage, and operates both wiper arms. This multi-functional design eliminates the need for separate specialized components for each function, reducing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If conventional wiper linkage systems use multiple pivot housings, link units, and pivot shafts, then the wiper arms can be operated, but the weight increases

Engineering Contradiction:

Improvewiper arm operationVSAvoidlinkage system weight

Core Design Contradiction:

Ease of operationVSWeight of moving object

Solution Approach 1:

By merging multiple separate components into a single integrated linkage mechanism, the total weight of the system is reduced. The elimination of redundant parts (multiple pivot housings, link units, pivot shafts) directly decreases the weight of the moving object while preserving the essential operational function.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If conventional wiper linkage systems use multiple pivot housings, link units, and pivot shafts, then the wiper arms can be operated, but the assembly process becomes complicated

Engineering Contradiction:

Improvewiper arm operationVSAvoidassembly process

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The integration of multiple components into a single linkage mechanism dramatically simplifies the assembly process. Instead of assembling multiple separate parts (pivot housings, link units, pivot shafts), the simplified design requires fewer assembly steps and less complex alignment procedures, making manufacturing and assembly easier.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of operation

If conventional wiper linkage systems use multiple pivot housings, link units, and pivot shafts, then the wiper arms can be operated, but the cost increases

Engineering Contradiction:

Improvewiper arm operationVSAvoidnumber of components

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent eliminates three specific components (pivot housing, link unit, pivot shaft) by merging their functions into a simplified linkage mechanism. This reduction in component count directly lowers material costs, manufacturing costs, and assembly costs while maintaining the essential operational capability of the wiper system.

Inventive Principle:

Principle #5Merging (Combining)

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 configuration reduces weight and cost, enhances design flexibility, simplifies assembly, and allows for effective wiper arm operation without additional rotating mechanisms, improving the wiper's operational efficiency and appearance.

Implementation Method 1

a rotary motion generated by a wiper motor is transmitted through a wiper linkage system to a wiper arm

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a crank mechanism. Here, one of the wiper arms 18 is directly coupled to a gear in a gear housing 16

Methodology Applied

Scientific EffectCrank mechanism: Crankshaft

Data Source

PatentUS11364877B2Wiper linkage system

Publication Date: 2022.06.21 HYUNDAI MOTOR CO LTD

AI summary

A wiper linkage system directly transmits rotating force of a motor to one wiper arm. The wiper linkage system includes: a gear housing installed on a wiper motor, a pipe rod installed on the gear housing, a crank arm installed on an output shaft of the wiper motor, a first wiper arm installed on a first end of the crank arm by a rotating shaft, a pivot housing assembled with the pipe rod, and a second wiper arm operated by a link structure including a link unit coupled to a second end of the crank arm and the pivot housing. In particular, a first end of the pipe rod is fixed to a vehicle body by a pipe mounting.