Motor Vehicle Wing Mirror Hinge Vibration Damping
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Solution Overview
Problem
Existing hinge constructions for wing mirror units in motor vehicles face challenges in reducing vibrations and noise during the folding mechanism, while also requiring a reliable and easy-to-assemble design that decouples the motor from the worm gear for efficient power folding.
Innovation Solution
A hinge construction featuring a gear box and upper case with a seal cover, including a socket with an axis separation part between the motor and motor worm, where the worm cap is snapped to a supporter of the upper case, allowing for disengagement of the drive mechanism under high external forces and reducing vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor and motor worm are rigidly fixed together in the gear box, then the power transmission is stable, but the vibrations and noise during folding cannot be reduced
Solution Approach 1:
The motor and motor worm are separated into independent components with the motor mounted on the gear box housing and the motor worm mounted on the pivotable arm, allowing independent vibration isolation while maintaining power transmission through flexible coupling
Solution Approach 2:
A flexible coupling or universal joint is introduced between the motor shaft and motor worm to transmit power while isolating vibrations and noise, allowing relative movement between the rigidly fixed motor and the pivotable arm
2Reliability
If the worm gear is fixed between a separation element connected to the motor and a fixed housing lower part with a separate pin, then the motor is decoupled from the motor worm, but the mounting of the worm gear becomes difficult
Solution Approach 1:
The gear box housing serves multiple functions: it provides the mounting structure for the motor, contains the worm gear mechanism, and acts as the pivot point for the entire assembly, simplifying the mounting process while maintaining motor decoupling
Data Source
AI summary
A hinge construction for a wing mirror unit for a motor vehicle is proposed that comprises a first hinge part for mounting on the motor vehicle and a second hinge part, pivotably connected therewith via a shaft. The second hinge part supports a mirror frame of the wing mirror unit, wherein the shaft is connected with one hinge part and wherein the other hinge part is arranged pivotably about the shaft. The mirror frame has a location guide that corresponds with a location rib of a power fold module that is inserted into the frame.