HMMWV Center Rear View Mirror Bracket Using Existing Bolt Holes

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Solution Overview

Problem

Military HMMWV series vehicles lack a center rear view mirror, which impairs driver visibility and safety while operating the vehicle.

Innovation Solution

A center rear view mirror bracket is designed to mount a standard rear view mirror using existing bolt holes on the windshield frame, featuring a 90-degree angle bend for mounting on the wiper motor area and an 80-degree angle bend for the mirror ball stud, fabricated from A36 mild steel or 5052 aluminum, allowing for installation without modifying the vehicle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a center rear view mirror is added to HMMWV vehicles, then driver visibility and safety are improved, but vehicle structure modification is required

Engineering Contradiction:

Improvedriver visibility and safetyVSAvoidvehicle structure modification

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The bracket design utilizes the vehicle's existing bolt holes and windshield frame structure to mount the mirror, allowing the vehicle to serve itself for mounting without requiring external modifications or additional structural changes

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The bracket is designed to work with the existing windshield frame and bolt hole configuration, making it compatible with the vehicle's current structure while enabling the addition of the mirror function

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If existing bolt holes are used for mounting, then installation complexity is reduced, but mounting position flexibility is limited

Engineering Contradiction:

Improveinstallation complexityVSAvoidmounting position flexibility

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The bracket incorporates angled bends (90-degree angle for mounting to the windshield frame and 80-degree angle for the mirror ball stud) that position the mirror in three-dimensional space relative to the bolt holes, achieving proper mirror positioning despite being constrained to existing hole locations

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS10442356B2HMMWV center rear view mirror bracket

Publication Date: 2019.10.15 BOBIK DAVID JAMES

AI summary

This invention is a center rear view mirror bracket for the HMMWV series vehicles. This bracket allows for the installation of a center rear view mirror on the HMMWV. The bracket is attached to the HMMWV using existing bolt holes on the windshield frame where wiper motor is attached. A center rear view mirror is then attached to the end of the bracket.