Vehicle Lighting Adjustment Device Eliminates Nut Assembly
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Solution Overview
Problem
The existing adjustment devices for motor vehicle lighting and signalling systems are complex and costly due to the requirement of a nut and screwing step for positioning, which complicates assembly and increases production costs.
Innovation Solution
A simplified adjustment device with a screw in mechanical liaison with one part and helical liaison with another, featuring a sliding pivot linkage and conformation that eliminates the need for a nut, allowing for easy assembly and rotation of parts without the need for screwing, using a hoop for stress management and point-shaped, linear annular, or socket head mechanical liaisons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nut and screwing step are used for adjustment, then the connection between parts is secure, but the assembly complexity and production cost increase
Solution Approach 1:
The patent extracts and eliminates the nut from the traditional screw-nut connection system. The adjustment device uses a screw with an integrated head that directly engages with a threaded hole in the support element, removing the need for a separate nut component and its associated assembly steps, thereby simplifying the device while maintaining secure connection.
Solution Approach 2:
The patent merges the screw head and the adjustment mechanism into a single integrated component. The screw element combines the fastening function with the adjustment function, allowing position adjustment and secure connection to be achieved through a single component rather than separate screw and nut elements.
2Reliability
If a nut and screwing step are used for adjustment, then the connection between parts is secure, but the production cost increases
Solution Approach 1:
The patent removes the nut from the assembly, reducing the number of parts that need to be manufactured, inventoried, and assembled. This extraction of the unnecessary nut element directly reduces production costs while the integrated screw design maintains secure connection through direct threading into the support element.
Solution Approach 2:
The integrated screw element with head serves as a complete, single-use adjustment and fastening component that eliminates the need for additional expensive nuts and assembly operations. The design prioritizes cost-effective manufacturing through part reduction while ensuring adequate connection security for the application.
3Manufacturing precision
If multiple assembly steps including screwing are used, then the adjustment precision is achieved, but the assembly time increases
Solution Approach 1:
The screw element is pre-configured with an integrated head and threading, so that the adjustment mechanism is already prepared before assembly. The operator simply needs to insert the screw and rotate it to achieve the desired position, eliminating the need for separate nut installation and tightening steps, thus reducing assembly time while maintaining precision.
Data Source
AI summary
Adjustment device of the position of a first part of a lighting and/or signaling device of a motor vehicle in relation to a second part of this device. The adjustment device has a screw in mechanical liaison with the first part and in helical liaison with the second part, the helical liaison comprising: a sliding pivot liaison linking the screw to the second part, the screw being clipped into a bore which has an opening according to a first axis (X) and a conformation completed on the second part which matches the threads of the screw.