Vehicle Camera Mirror Assembly Vibration Attenuation
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Solution Overview
Problem
Camera mirror assemblies for vehicles face issues with vibration during motor operation and external particle ingress, leading to potential failure or defect.
Innovation Solution
A camera mirror assembly with a folding unit that includes a driving motor, gear system, and a vibration attenuator using an elastic member to reduce vibrations, along with a sealing member to prevent external particles from entering the motor compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the camera mirror is rotated to be folded or unfolded using the motor, then the camera mirror can be folded or unfolded automatically, but vibration occurs due to the operation of the motor which may cause failure or breakage of the camera mirror
Solution Approach 1:
A vibration attenuator is installed in advance within the housing to cushion and absorb the vibration generated by the motor during folding and unfolding operations. This beforehand cushioning prevents the vibration from reaching and damaging the camera mirror, thus maintaining reliability while preserving automatic operation capability.
2Ease of operation
If the camera mirror is provided outside the vehicle, then the driver can recognize another vehicle or pedestrian, but external particles may enter the camera mirror which may cause failure or defect of the motor
Solution Approach 1:
The housing is segmented into a motor chamber and a camera chamber, separated by a partition wall. This segmentation isolates the motor from external particles while allowing the camera to remain exposed for visibility, thus protecting motor reliability without compromising driver visibility.
Solution Approach 2:
The partition wall acts as an intermediary barrier between the external environment and the motor. It prevents external particles from entering the motor chamber while allowing the camera to capture images for driver visibility, thus mediating between protection and exposure requirements.
3Volume of moving object
If the camera mirror housing is made compact, then air resistance is reduced, but the motor and gear system require sufficient space to operate
Solution Approach 1:
The gear system is nested within the housing structure, with the pinion gear integrated into the motor assembly and the crown gear positioned within the available internal space. This nesting arrangement minimizes the overall housing volume while accommodating all necessary motor and gear components for folding and unfolding operations.
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 effectively attenuates motor-induced vibrations and prevents particle ingress, enhancing the reliability and longevity of the camera mirror assembly by reducing the risk of failure and defect.
Implementation Method 1
a vibration attenuator configured to attenuate vibration generated by the driving portion. The vibration attenuator may include an elastic member mounted in a cover coupled to the driving housing and disposed to contact an end portion of the rotational shaft
Data Source
AI summary
A camera mirror assembly for a vehicle includes a folding unit configured to be rotated with respect to a fixed shaft formed in a base provided in the vehicle; and a support frame in which the folding unit and a camera are mounted at both ends thereof, wherein the support frame is configured to be folded or unfolded to change a position of the camera as the folding unit rotates. Further, the folding unit includes a driving housing, a driving portion, a driven gear portion fixed to the fixed shaft, and a driving force transfer portion for transferring a driving force of the driving portion to the driven gear portion.