Vehicle Vision Unit Adjuster with Nested Spring Gear
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Solution Overview
Problem
Existing adjusting instruments for exterior vision units in vehicles face challenges in miniaturization due to the need for robust and force-resistant properties, which complicates their compact design and increases air resistance, especially when incorporating digital components like cameras and displays.
Innovation Solution
The design incorporates a recessed spring within the driving gearwheel, allowing for a reduced axial dimension while maintaining spring length and force, along with a compact gearwheel configuration and a single-screw mounting system to minimize space and assembly complexity, and includes cam rings and an electric motor for efficient pivoting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the adjusting instrument is miniaturized to reduce air resistance, then the volume and air resistance are reduced, but the robustness and force resistance deteriorate
Solution Approach 1:
The spring is nested within the driving gearwheel by recessing its support surface into the gearwheel body. This allows the spring to be housed inside the gearwheel structure rather than occupying external space, achieving miniaturization of the overall adjusting instrument while preserving the spring's full length and force-generating capability. The spring effectively becomes an internal component of the gearwheel assembly.
2Length of moving object
If the spring length is reduced to compact the adjusting instrument, then the volume is reduced, but the spring force and reliability deteriorate
Solution Approach 1:
Instead of reducing the spring's axial length, the invention relocates the spring's support surface axially inward into the gearwheel body. This dimensional repositioning allows the spring to maintain its full operational length and force characteristics while the overall axial dimension of the adjusting instrument is reduced because the spring is now housed within the gearwheel's radial structure rather than extending externally.
3Stability of the object's composition
If multiple mounting screws are used to ensure stability, then the reliability and stability are improved, but the assembly complexity and device complexity increase
Solution Approach 1:
The invention merges the mounting function into the base shaft structure itself by providing a receiving provision directly in the base shaft. This integration eliminates the need for separate mounting screws and associated fastening hardware, reducing assembly complexity while maintaining stable mounting through the unified base shaft-receiving provision interface.
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 results in a more compact, stable, and efficient adjusting instrument that maintains robustness and force resistance, reducing air resistance and simplifying assembly while enabling a more compact and reliable exterior vision unit.
Implementation Method 1
a spring (10) which surrounds the base shaft (2), which spring (10) is supported on a support surface (11) of the gearwheel body (20) for exerting a spring force on the driving gearwheel (4) along the longitudinal axis (A)
Data Source
AI summary
The invention relates to an adjusting instrument for an exterior vision unit for a vehicle, comprising a base shaft and a housing surrounding the base shaft which is pivotable around a longitudinal axis adjustment range between at least a park position and a drive position. The adjusting instrument further comprises a driving gearwheel, a gearwheel body, and a spring. The driving gearwheel includes a face provided with an outer toothing surrounding the base shaft, defining a face height within which a web part of the gearwheel body extends in a transverse plane with respect to the base shaft. The spring surrounds the base shaft and is supported on a support surface of the gearwheel body, exerting a force on the driving gearwheel along the longitudinal axis. The support surface lies recessed in an axial direction with respect to the transverse plane, such that the spring reaches through the transverse plane.