Motor Vehicle Headlight Positioning Device with Rotary Screw
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle headlight positioning designs suffer from instability due to axial vibrations of the linear-movement screw, affecting the displacement stability of the headlight projecting direction.
Innovation Solution
A motor vehicle headlight positioning device that uses a rotatable screw rod to transmit driving force without axial displacement, incorporating a holder base, headlight support, stepping motor, movable member, and swivel arm, with a spring member and position sensor for enhanced stability and precise adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear-movement screw is used to transmit driving force, then the headlight projecting direction can be adjusted, but axial vibrations occur affecting displacement stability
Solution Approach 1:
The patent replaces the linear-movement screw with a rotary screw rod that transmits driving force through rotation only. The rotary screw rod is supported by bearing structures that constrain axial movement, substituting the linear transmission mechanism with a rotational one that inherently provides better stability and eliminates axial vibrations during operation.
Solution Approach 2:
The patent divides the screw transmission system into separate functional components: the rotary screw rod for force transmission, independent bearing structures for axial support, and a movable member for positioning. This segmentation allows each component to perform its specific function optimally, with bearings dedicated to preventing axial displacement of the screw rod.
2Ease of operation
If the screw is extended out to the extent, then the headlight support can be oscillated, but the screw vibrates heavily affecting displacement stability
Solution Approach 1:
The patent introduces bearing structures as intermediary elements between the rotary screw rod and the holder base. These bearings act as mediators that support the screw rod during rotation and effectively isolate axial vibrations, allowing the screw to be extended for full adjustment range while maintaining displacement stability through the intermediary bearing support.
3Reliability
If a linear-movement screw is used, then axial positioning support is needed, but without it vibrations occur
Solution Approach 1:
The patent merges the axial positioning support function into the existing bearing structures that are already part of the rotary screw rod assembly. By combining the rotational support and axial constraint functions into integrated bearing components, the design achieves reliable axial positioning without adding separate complex support structures.
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 ensures enhanced displacement stability and precise adjustment of the headlight projecting direction by minimizing axial movement and accurately transferring rotary driving force, improving the overall stability and accuracy of headlight positioning.
Implementation Method 1
The stepping motor is mounted in the holder base, comprising an output screw for outputting a rotary driving force
Implementation Method 2
The output screw is rotatably mounted in the stepping motor and prohibited from an axial movement
Implementation Method 3
The movable member comprises a body meshed with the output screw
Implementation Method 4
a spring member sleeved onto the output screw and stopped between the support block of the holder base and the body of the movable member
Implementation Method 5
a position sensor mounted in the holder base and adapted for sensing the position of the movable member in said holder base
Data Source
AI summary
A motor vehicle headlight positioning device consisting of a holder base, a headlight support, a step motor, a movable member and a swivel arm is disclosed. The headlight support is pivotally mounted in the holder base to hold a motor vehicle headlight. By means of the rotation of an output screw of the step motor to move the movable member linearly, the headlight support is rotatable by the movable member and the swivel arm to adjust the projecting direction of the motor vehicle headlight. As the output screw is rotated on its own axis and the output screw is supported in a support block of the holder base, the displacement stability of the movable member is enhanced.