Retractable Vehicle Camera Assembly With Elastic Motor Mounting
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Solution Overview
Problem
Conventional electric retractable periphery visual recognition devices for vehicles experience rattling issues due to the direct accommodation of motors between case and cover components, leading to inefficient rotation of the rotary body.
Innovation Solution
The device incorporates a holding member with elastic properties, positioned between the motor and casings of higher rigidity, which absorbs dimensional tolerance variations, ensuring smooth rotation by reducing rattling and allowing precise attachment of the motor and speed reduction mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor is directly accommodated between the case and cover without additional holding structures, then the device complexity is reduced, but rattling occurs between the motor, case, and cover causing the rotary body to rotate unevenly
Solution Approach 1:
The holding member is introduced as an intermediary component between the motor and the case. It features a motor holding portion that engages with the motor's outer peripheral surface and a case holding portion that engages with the case's inner peripheral surface, thereby mediating the connection and eliminating rattling while ensuring smooth rotation of the rotary body
2Manufacturing precision
If the motor is held firmly between rigid case components, then the motor position is stabilized, but the dimensional tolerance variations cause rattling and rotation issues
Solution Approach 1:
The holding member is designed with elastic properties, representing a change in the physical parameter of rigidity. This elasticity allows the holding member to absorb dimensional tolerance variations in the motor, case, and cover, preventing rattling while maintaining secure motor positioning and ensuring smooth rotation
3Volume of moving object
If the motor axial direction intersects with the shaft direction for compact design, then the device volume is reduced, but the motor attachment becomes more complex
Solution Approach 1:
The holding member features locally differentiated structures: a motor holding portion with engagement protrusions designed to fit the motor's outer peripheral surface, and a case holding portion with corresponding engagement features for the case's inner peripheral surface. This localized structural differentiation enables secure attachment in the intersecting axial configuration while maintaining compact device volume
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 enables the visual recognition assembly to rotate smoothly, reduces manufacturing costs, and allows for a more compact design by intersecting the motor's axial direction with the shaft's, effectively replacing traditional mirrors with camera units.
Implementation Method 1
the holding member includes an elastic member
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
This disclosure comprises a base 2, a shaft 3, and a visual recognition assembly 4. The visual recognition assembly 4 has a housing 4H, a visual recognition unit 5, and an electric retractable unit 6. The electric retractable unit 6 has a shaft 3, casings 6U and 6D, a motor 7M, a speed reduction mechanism 7, and a holding member 7H. The casings 6U and 6D are configured by members that have a rigidity higher than that of the holding member 7H. The holding member 7H is configured by an elastic member. As a result, the present invention enables the visual recognition assembly 4 to rotate smoothly.